55915

Appears in sequences

• a(n) = Sum_{i=1..floor((n+1)/4)} a(2*i-1) * a(n-2*i+1), with a(1)=a(2)=1.at n=27A024722
• Number of 3Xn 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=11A303183
• Number of rectangular plane partitions of n with no repeated rows or columns.at n=34A323435
• G.f. satisfies A(x) = x/(1-x) + Sum_{n>=1} A(x^n)^2.at n=9A382321