67636

Appears in sequences

• Number of n X n circulant singular (0,1) matrices over the reals.at n=17A086328
• (Number of permutations of {1,2,...,n} for which sums of five consecutive numbers (with wraparound) are all distinct)/2n.at n=4A206480
• a(n) = 4*n*(n^2 + 2)/3.at n=37A217873