39060

Appears in sequences

• Theta series of D_6 lattice.at n=25A008428
• Number of nonnegative integer 3 X 3 matrices with no zero rows or columns and with sum of elements equal to n, up to row and column permutation.at n=15A054975
• Numbers k such that sigma(prime(k) + 1) == 0 (mod k).at n=44A067759
• Triangular numbers which are products of triangular numbers larger than 1.at n=31A068143
• Triangular numbers which are 7-almost primes.at n=17A076581
• Triangular numbers using only the curved digits 0, 3, 6, 8 and 9.at n=13A079653
• Triangular numbers > 0 with a prime signature that has not occurred earlier.at n=31A085076
• Numbers in the cycle-attractors of length=14 of the function f(x)=A063919(x).at n=22A097030
• Numbers whose set of base 6 digits is {0,5}.at n=36A097252
• Triangular numbers for which the sum of the digits is a heptagonal number.at n=33A117312
• (n+n^2+n^3)*(binomial(2*n,n)).at n=5A119576
• Numbers m that raised to the powers from 1 to k (with k>=1) are multiple of the sum of their digits (m raised to k+1 must not be a multiple). Case k=15.at n=5A135200
• Eigentriangle, row sums = A125275.at n=40A147294
• Numbers with prime factorization pqrs^2t^2.at n=16A189989
• Triangular numbers k whose divisors can be partitioned into three disjoint sets whose sums are all sigma(k)/3.at n=21A206025
• Triangular numbers that are hypotenuse and a leg of a Pythagorean triple.at n=36A213188
• Triangular numbers that are the product of three distinct triangular numbers greater than 1.at n=14A225440
• Triangular numbers that are the product of a triangular number and an oblong number.at n=20A253652
• Triangle read by rows: coefficients eta(n,k) arising from the study of completely transitive graphs on n nodes.at n=19A259970
• Triangle read by rows. A generalization of unsigned Lah numbers, called L[3,2].at n=63A290598