73976

Appears in sequences

• a(n) = 64*n^2 - 8.at n=33A158487
• Number of columns with top entry equal to bottom entry in all the 2-compositions of n. A 2-composition of n is a nonnegative matrix with two rows, such that each column has at least one nonzero entry and whose entries sum up to n.at n=10A181300
• G.f.: A(x) = Sum_{n>=0} x^(n*(n+1)/2) / Product_{k=1..n} (1-x^k)^(n-k+1).at n=26A206139
• Number of nondecreasing -4..4 vectors of length n whose dot product with some nondecreasing -4..4 vector equals n.at n=10A226407
• a(n) is the number of distinct five-cuboid combinations filling n X n X n cube without allowing a cut spanning through the full cube in any of filling positions.at n=33A384743