151539

Appears in sequences

• a(n) = Sum_{j=0..floor(n/2)} (-1)^(j+floor(n/2))*S(2j+q), where S(n) are generalized tribonacci numbers (A001644) and q = (1-(-1)^n)/2.at n=20A074678
• G.f. A(x) satisfies A(x) = 1 + x*A(x)/A(-x*A(x))^4.at n=9A385016
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A385016.at n=64A385020