148785

Appears in sequences

• a(n) = (2*n-1)*(13*n^2-13*n+6)/6.at n=32A063493
• Number of meaningful differential operations of the n-th order on the space R^9.at n=15A090994
• The number of binary pattern classes in the (2,n)-rectangular grid with 6 '1's and (2n-6) '0's: two patterns are in same class if one of them can be obtained by a reflection or 180-degree rotation of the other.at n=15A228581
• Pyramidal centered square numbers.at n=16A237516
• Triangular numbers that are repdigits with length > 2 in some base.at n=35A274084
• The first of two consecutive triangular numbers the sum of which is equal to the sum of two consecutive prime numbers.at n=34A298462
• Triangular numbers which are products of five distinct primes.at n=35A357590
• a(n) is the least positive integer k such that Mordell's equation y^2 = x^3 + k^2 has exactly n integer solutions with y >= 0.at n=24A392549