151321
domain: N
Appears in sequences
- a(n) = (11*n + 4)^2.at n=35A017438
- a(n) = (12*n + 5)^2.at n=32A017582
- Numbers n such that sigma(d(n^3))==d(sigma(n^2)), where d(n) is the number of divisors of n.at n=29A063797
- Squares in which the k-th significant digit either divides k or is a multiple of k.at n=27A069560
- Perfect powers using only prime digits and 1.at n=18A083806
- Squares that are a sum of twin primes and their indices.at n=2A088188
- Squares of the form 6p+7 for p prime (A110015) that are squares of a prime.at n=31A110586
- Squares in A076361.at n=35A115557
- Numbers k such that sigma(k) - phi(k) is a brilliant number (A078972).at n=27A115917
- A positive integer is included if it is a square that contains the same number of 0's as 1's when represented in binary.at n=32A164343
- Composite numbers with both 10 and -10 as primitive root.at n=18A218766
- Prime powers (A025475) representable as (p+q)/2, where p and q are distinct prime powers.at n=27A225388
- Squares whose largest digit is 5.at n=26A295015
- Squares of primes congruent to 1 (mod 30).at n=33A330670
- The position of the first n in A339895.at n=45A339897
- Numbers k for which phi(k)+1 is a multiple of d(k), where phi is Euler totient function (A000010) and d(n) gives the number of divisors of n (A000005).at n=46A342665