55656

Appears in sequences

• McKay-Thompson series of class 36C for Monster.at n=53A058646
• a(n) = Sum_{k=0..n} C(n,k)^2*(n-k)!*k^2.at n=6A105219
• Triangle T(n,k) read by rows: Sum_{k=0..binomial(n,2)} T(n,k)*q^k = n!*Sum_{pi} faq(n,q)/Product_{i=1..n} e(i)!*faq(i,q)^e(i), where pi runs over all nonnegative integer solutions to e(1) + 2*e(2) + ... + n*e(n) = n and faq(i,q) = Product_{j=1..i} (q^j-1)/(q-1), i = 1..n.at n=43A152474
• Numbers which have only digits 5 and 6 in base 10.at n=35A256291
• Euler transform of the Fubini numbers (ordered Bell numbers, A000670).at n=7A290352
• Irregular table whose rows list the nontrivial cycles of the ghost iteration A329201, starting with the smallest member.at n=14A329342
• Pythagorean triples (X, Y, Z) that are the componentwise products of 2 primitive Pythagorean triples (x,y,z) and (r,s,t), that is, X=x*r, Y=y*s, ordered by increasing Z.at n=17A340790
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = Sum_{j=0..n} j^k * (n-j)! * binomial(n,j)^2.at n=42A341200