Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + 3*A(x)) = 1 + 4*Sum_{n>=1} x^(n*(n+1)/2).
A370143
Expansion of g.f. A(x) satisfying Sum_{n>=0} Product_{k=1..n} (x^k + 3*A(x)) = 1 + 4*Sum_{n>=1} x^(n*(n+1)/2).
Terms
- a(0) =1a(1) =-4a(2) =16a(3) =-64a(4) =252a(5) =-980a(6) =3752a(7) =-14076a(8) =51384a(9) =-180488a(10) =597812a(11) =-1788936a(12) =4284828a(13) =-3665376a(14) =-47694524a(15) =475585724a(16) =-3186717720a(17) =18465627936a(18) =-98993741736a(19) =504886869432
External references
- oeis: A370143