60690

Appears in sequences

• Weight enumerator of [ 40,19,10 ] shortened QR code.at n=12A030645
• The binary encoding (as a rooted planar tree) of each rooted planar binary tree. See A057123 for illustration.at n=21A057122
• Partial sums of n 3-spaced triangular numbers beginning with t(2), e.g., a(2) = t(2) + t(5) = 3 + 15 = 18.at n=33A085789
• a(n) = n^2*(n+1)*(2*n+1)/3.at n=16A098077
• Numbers n that raised to the powers from 1 to k (with k>=1) are multiple of the sum of their digits (n raised to k+1 must not be a multiple). Case k=12.at n=22A135197
• Expansion of e.g.f.: exp(t*x)/(1 - x/t - t^2 * x^2).at n=57A158706
• a(n) = 6*n^2*(2*n + 1).at n=17A190705
• Number of (w,x,y,z) with all terms in {1,...,n} and |x-y|=|y-z|+1.at n=35A212680
• Number of length n+4 0..2 arrays with at most one downstep in every n consecutive neighbor pairs.at n=15A255111
• Number of partitions of 5n into exactly 4 parts.at n=41A256327
• Number of palindromic periodicities among the binary words of length n.at n=19A374495
• Square array A(n,k) = A388991(A388981(n, k)), read by descending antidiagonals.at n=60A388989
• Numbers k such that A392858(k) divides k.at n=49A392613