76712

Appears in sequences

• Number of squares (of another matrix) in M_2(n) - the ring of 2 X 2 matrices over Z_n.at n=39A068197
• a(n) = prime(prime(n*n) - n*n) - n*n where prime(n) is the n-th prime.at n=32A141127
• Number of length 2+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.at n=30A248539
• Number of forests of exactly n (unlabeled) ordered rooted trees with a total of 2n non-root nodes.at n=9A292668
• Triangular array read by rows: T(n,k) is the number of n-node Stanley graphs containing exactly k connected components, n>=0, 0<=k<=n.at n=38A383656