273504

Appears in sequences

• Theta series of A_7 lattice.at n=29A008447
• Numbers k such that sigma(k+1) = 5*phi(k).at n=19A067263
• Number of permutations of 5 indistinguishable copies of 1..n with exactly 5 adjacent element pairs in decreasing order.at n=2A151650
• Triangle in which the g.f. for row n is [Sum_{k>=0} C(n+k-1,k)^3*x^k]*(1-x)^(3n+1), read by rows of k=0..2n terms.at n=30A181544
• Central terms of triangle A181544.at n=5A183204
• Irregular triangle read by rows: T(n,k) = Sum_{i=0..k} (-1)^i * binomial(5*n+1,i) * binomial(k+5-i,5)^n, 0 <= k <= 5*(n-1).at n=12A237202
• a(n) = 3*n*(n^2 + 3*n + 4).at n=44A280304
• Number of 3Xn 0..1 arrays with every element equal to 0, 1, 2, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=9A302821
• Number of 4-cycles in the n-cycle complement and (n+1)-wheel complement graph.at n=39A367985