25865

Appears in sequences

• a(n) = (n+5)^3 - n^3.at n=39A038867
• Same rule as Aitken triangle (A011971) except a(0,0)=1, a(1,0)=0.at n=51A046934
• Sequence formed from rows of triangle A046934.at n=41A046935
• a(1) = 1+2-3 = 0, a(2) = 4+5+6-7 = 8, a(3) = 8+9+10+11-12 = 26, a(4) = 13+14+15+16+17-18 = 57, ...at n=35A111694
• Main diagonal of array A[k,n] = n-th sum of k consecutive k-gonal numbers, k>2.at n=11A130424
• Numbers k such that k and k^2 use only the digits 2, 5, 6, 8 and 9.at n=7A137114
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (-1, 1, -1), (1, 0, -1), (1, 0, 1)}.at n=9A149149
• Unlabeled trees with n nodes rooted at 2 indistinguishable roots that are leaves.at n=13A303840
• Expansion of 1 / (1 + Sum_{k>=1}(-x)^Lucas(k)).at n=36A357384
• Expansion of e.g.f. exp( (exp(3*(exp(x)-1))-1)/3 ).at n=6A369785