270346

Appears in sequences

• Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=5A299308
• Number of nX6 0..1 arrays with every element equal to 1, 2, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=5A299312
• a(n) = Sum_{d|n} phi(d)^(n-d+1).at n=15A342617