26909

Appears in sequences

• a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = (F(2), F(3), ...).at n=16A024591
• a(n) = 961*n + 1.at n=27A158414
• a(n) = 28*n^2 + 1.at n=31A158556
• Principal diagonal of the convolution array A213587.at n=8A213588
• Numbers m that generate rotationally symmetrical XOR-triangles T(m) that have central triangles of zeros.at n=28A334769
• a(n) = 8*n^3 - 6*n - 1.at n=15A369922