317056

Appears in sequences

• Number of permutations (p1,...,pn) such that 1 <= |pk - k| <= 2 for all k.at n=22A033305
• Number of n X 2 array permutations with each element moving one space diagonally, horizontally or vertically.at n=10A189348
• G.f.: Sum_{n=-oo..+oo} (1 + x^n)^n / (1 - x^n)^n, ignoring the constant term.at n=59A292180