33580

Appears in sequences

• Number of nonseparable rooted toroidal maps with n + 4 edges and n + 1 vertices.at n=4A006409
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Lucas numbers), t = A000201 (lower Wythoff sequence).at n=25A024474
• a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Lucas numbers), t = A000201 (lower Wythoff sequence).at n=24A025094
• CONTINUANT transform of {d(n)}, 1, 2, 2, 3, 2, 4, ... (A000005).at n=9A071108
• Decagonal numbers divisible by 10.at n=19A117797
• a(n) = n*(n^2 + 2*n - 1)/2.at n=39A127736
• White to move: King, Knight and Bishop vs. King: Number of positions with mate in n.at n=31A274683
• Triangle read by rows: T(n,k) is the number of nonseparable rooted toroidal maps with n edges and k faces, n >= 2, k = 1..n-1.at n=23A342989
• Triangle read by rows: T(n,k) is the number of nonseparable rooted toroidal maps with n edges and k faces, n >= 2, k = 1..n-1.at n=25A342989
• Numbers k that divide the k-th Franel number.at n=24A372940