66836

Appears in sequences

• Starting at the chess position shown, a(n) is the number of ways Black can make n consecutive moves, followed by a checkmate in one move by White.at n=22A078993
• Number of sequences with terms 1, 2 or 3 summing to n with no three consecutive 1's.at n=21A123908
• Triangular array read by rows, T(n,k) = number of partial functions on {1,2,...,n} with exactly k cycles.at n=41A216520
• Harary index of the n X n queen graph.at n=21A296196