54248

Appears in sequences

• Theta series of odd 8-dimensional 5-modular lattice O(5).at n=40A029719
• Number of nonisomorphic commutative groupoids with no idempotents and a nontrivial symmetry.at n=5A030262
• Triangle: T(n,k), k<=n: commutative groupoids with a nontrivial symmetry with n elements and k idempotents.at n=15A038023
• a(n) = C(n+6, 6) - n - 1.at n=15A062989
• Number of n X 4 0..1 arrays with the number of 1's king-move adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=4A284451
• Number of n X 5 0..1 arrays with the number of 1's king-move adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=3A284452
• T(n,k) = Number of n X k 0..1 arrays with the number of 1's king-move adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=31A284455
• T(n,k) = Number of n X k 0..1 arrays with the number of 1's king-move adjacent to some 0 one less than the number of 0's adjacent to some 1.at n=32A284455