51865

Appears in sequences

• Expansion of 1/sqrt((1-x)^2-8x^3).at n=13A098480
• Number of permutations of length n which avoid the patterns 123 and 4312.at n=32A116699
• Number of ways to go up and down n stairs, with fewer than 4 stairs at a time, stepping on each stair at least once.at n=10A287898
• Number of nX7 0..1 arrays with every element equal to 1, 2 or 4 king-move adjacent elements, with upper left element zero.at n=20A297857