61776

Appears in sequences

• Sum of 5th powers: 0^5 + 1^5 + 2^5 + ... + n^5.at n=8A000539
• a(n) = 1^n + 2^n + ... + 8^n.at n=5A001555
• Doubly triangular numbers: a(n) = n*(n+1)*(n^2+n+2)/8.at n=26A002817
• a(n) = 3*(n+1)*binomial(n+2,6).at n=7A027779
• a(n) = 4*(n+1)*binomial(n+2,8).at n=5A027781
• "DHK[ 6 ]" (bracelet, identity, unlabeled, 6 parts) transform of 1,1,1,1,...at n=33A032247
• Coefficient triangle of certain polynomials N(4; m,x).at n=52A062264
• a(n) = A062401(A065391(n)): phi(sigma(m)) peak values for numbers m (listed in A065391) at which those peaks are first reached.at n=29A065392
• Triangular numbers which remain triangular when the most significant digit is moved to the end.at n=12A067269
• Smallest triangular number which is a multiple (>1) of the n-th triangular number.at n=31A068084
• Triangular numbers which are products of triangular numbers larger than 1.at n=36A068143
• a(n) = smallest triangular number having no digit in common with the previous term, with a(1) = 1.at n=30A068818
• Triangular numbers which are 9-almost primes.at n=1A076583
• Triangular numbers that are 6 times other triangular numbers.at n=5A077290
• Triangular numbers > 0 with a prime signature that has not occurred earlier.at n=35A085076
• Triangular numbers whose sum of squared digits is also triangular.at n=24A094890
• Structured heptagonal anti-diamond numbers (vertex structure 7).at n=25A100186
• a(n) = binomial(n+7,7)*binomial(n+11,7).at n=2A104476
• a(n) = binomial(n+2,n)*binomial(n+6,n).at n=7A105249
• a(n) = (n+1)^3*(2n+1)(5n+1).at n=5A109117