523072

Appears in sequences

• Number of set partitions of [n] with alternating parity of elements and exactly five blocks.at n=11A305779
• a(n) = (1+n)*(2*a(n-1) - (n-2)*a(n-2)) with a(0) = a(1) = 1.at n=7A361649
• Triangle read by rows: T(n, k) = 2^k * hypergeom([-n, -k], [], 1/2).at n=51A375854