92665

Appears in sequences

• a(n) = [ a(n-1)/a(1) + a(n-3)/a(3) + a(n-5)/a(5) + ... ], for n >= 3.at n=36A022865
• Triangular numbers whose reverse is prime.at n=19A066751
• Triangular numbers with sum of digits = 28.at n=28A068132
• Triangular numbers such that the product of digits is also a (positive) triangular number.at n=22A069077
• Triangular numbers which are one more than a product of distinct triangular numbers.at n=31A083517
• Triangular numbers whose sum of aliquot divisors is a prime number.at n=34A083676
• Triangular numbers in which the sum of the external digits equals the sum of the internal digits.at n=22A088289
• Triangular numbers whose digit reversal is prime; trailing zeros are permitted.at n=26A115704
• a(n) = m*(m+1)/2, where m = floor(n^(3/2)).at n=56A185541
• Primitive numbers in A229307.at n=38A229311
• Number of (6+2)X(n+2) 0..4 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=12A252967
• The first of three consecutive triangular numbers the sum of which is equal to the sum of three consecutive primes.at n=33A298168
• Smallest number m in a set of at least three consecutive triangular numbers with three distinct prime factors.at n=21A349539