39840

Appears in sequences

• Theta series of lattice A_2 tensor D_5 (dimension 10, det. 3888, min. norm 4).at n=9A033697
• Braided power sequence: this is b(n+1) = 3*b(n) + 2*d(n) - c(n), A065693 is c(n+1) = 3*c(n) + 2*b(n) - d(n) and A065694 is d(n+1) = 3*d(n) + 2*c(n) - b(n), starting with b(0) = 0, c(0) = 1 and d(0) = 2.at n=8A065692
• Group successively larger composite numbers so that the sum of the n-th group is a multiple of n. Sequence gives the sum of the terms in the n-th group.at n=39A074120
• Triangle T(n,k) read by rows: T(n,k) = number of cycles of length 2k in the binary n-cube, for n >= 2, k = 2, 3, ..., 2^(n-1).at n=28A085452
• Number of different strings of length n+4 obtained from "123...n" by iteratively duplicating any substring.at n=26A137741
• Triangle T(n,k) for A(x)^k=sum(n>=k T(n,k)*x^n), where o.g.f. A(x) satisfies A(x)=(a+b*x*A(x))/(c-d*x*A(x)), a=1,b=2,c=1,d=2.at n=40A183875
• Number of 8-cycles in the hypercube graph Q_n.at n=6A364688
• Numbers x such that there exist three integers 0<x<=y, z>0 and w>0 such that sigma(x)^3 = sigma(y)^3 = x^3 + y^3 + z^3 + w^3.at n=48A385397