110466

Appears in sequences

• a(n) = number of (s(0), s(1), ..., s(2n)) such that s(i) is a nonnegative integer and |s(i) - s(i-1)| = 1 for i = 1,2,...,n, s(0) = 2, s(2n) = 6. Also a(n) = T(2n,n-2), where T is the array defined in A026009.at n=8A026014
• a(n) = n^2*(n-1)*(n-2).at n=17A047929
• Number of unlabeled multigraphs with loops allowed and n edges covering three vertices.at n=34A327728