27657838272domain: NAppears in sequencesDiagonal sums of the triangle A190152.at n=22A190154a(n) = Sum_{k=0..floor(n/2)} binomial(n+4*k,n-2*k).at n=22A373904Expansion of (1 - x - x^3)/((1 - x - x^3)^2 - 4*x^4).at n=33A375279