19218

Appears in sequences

• Number of two-sided n-step prudent walks avoiding two or more consecutive west steps and two or more consecutive south steps.at n=11A190589
• Sum of squares of cycle lengths for different cycles in Fibonacci-like sequences modulo n.at n=19A233246
• Number of representations of 0 as a sum of numbers d*k with d in {-1,1} and k in {1,2,...,n}, where the sum of the numbers k is 2n.at n=18A236429
• Triangle T(n,k) read by rows: coefficients of polynomials P_n(t) defined in Formula section.at n=60A287030
• Number of inequivalent ways of placing 2 nonattacking rooks on n X n board up to rotations and reflections of the board.at n=23A307304
• Numbers k such that k divides sum of k-th twin prime pair.at n=32A335303