Sequences

Numbers k whose decimal representation, read as a base-15 value and divided by k, yields an integer.

Quotient of 'base-15' division described in A032561.

Numbers k such that A102489(k) is divisible by k.

Quotient of 'base-16' division described in A032563.

Numbers k whose decimal representation, read as a base-17 value and divided by k, yields an integer.

Quotient of 'base-17' division described in A032565.

Numbers k whose decimal representation, read as a base-18 value and divided by k, yields an integer.

Quotient of 'base-18' division described in A032567.

Numbers k whose decimal representation, read as a base-19 value and divided by k, yields an integer.

Quotient of 'base-19' division described in A032569.

Numbers k whose decimal representation, read as a base-20 value and divided by k, yields an integer.

Quotient of 'base-20' division described in A032571.

Numbers k whose decimal representation, read as a base-21 value and divided by k, yields an integer.

Quotient of 'base-21' division described in A032573.

Numbers k whose decimal representation, read as a base-22 value and divided by k, yields an integer.

Quotient of 'base-22' division described in A032575.

Numbers k whose decimal representation, read as a base-23 value and divided by k, yields an integer.

Quotient of 'base-23' division described in A032577.

Numbers k whose decimal representation, read as a base-24 value and divided by k, yields an integer.

Quotient of 'base-24' division described in A032579.

Numbers k such that A174141(k) is divisible by k.

Quotient of 'base-25' division described in A032581.

Numbers which are neither prime nor lucky.

Odd numbers which are neither prime nor lucky.

Lucky numbers ending with digit 1.

Lucky numbers ending with digit 3.

Lucky numbers ending with digit 5.

Lucky numbers ending with digit 7.

Lucky numbers (A000959) ending with digit 9.

Primes in which 'last digit cycle' is {1,3,7,9}.

Four consecutive primes whose 'last digit cycle' equals {1,3,7,9}.

Initial terms of '4-block' primes as described in A032591.

Lesser of two consecutive palindromes, both of which are prime.

Greater of two consecutive palindromes, both of which are prime.

First of three consecutive palindromes all of which are prime.

Second of three consecutive palindromes all of which are prime.

Third of three consecutive palindromes all of which are prime.

Squares of lucky numbers.

Cubes of lucky numbers.

Difference between n-th lucky number and n-th prime number.

a(n) = n-th prime number * n-th lucky number.

a(n) = n-th prime number + n-th lucky number.

Concatenation of n-th prime number and n-th lucky number.

Decimal concatenation of n-th lucky number and n-th prime number.

Prime numbers indexed by lucky numbers.

Lucky numbers indexed by prime numbers.

Concatenation of n and n + 2 or {n,n+2}.

Concatenation of n and n + 3.

Concatenation of n and n + 4 or {n,n+4}.

Concatenation of n and n + 5 or {n,n+5}.