33822

Appears in sequences

• Number of nX3 0..1 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other.at n=16A201379
• Number of 2 X 2 matrices having all terms in {1,...,n} and determinant d satisfying -n < d < n.at n=21A211070
• a(n) = 2*a(n-1) - a(n-3) for n >= 5, a(0) = 2, a(1) = 4, a(2) = 7, a(3) = 12, a(4) = 22.at n=19A289107
• G.f. satisfies A(x) = exp( Sum_{k>=1} (3 * (-1)^k + A(x^k)) * x^k/k ).at n=24A363566