174505

Appears in sequences

• Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, vertical, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-2.at n=33A211911
• Expansion of (1/x) * Series_Reversion( x * (1 - x)^2 / (1 + x^3 / (1 - x)^3) ).at n=8A389550