G.f. A(x) defined by: A(x)^4 consists entirely of integer coefficients between 1 and 4 (A083954); A(x) is the unique power series solution with A(0)=1.
A084204
G.f. A(x) defined by: A(x)^4 consists entirely of integer coefficients between 1 and 4 (A083954); A(x) is the unique power series solution with A(0)=1.
Terms
- a(0) =1a(1) =1a(2) =-1a(3) =3a(4) =-7a(5) =20a(6) =-58a(7) =177a(8) =-554a(9) =1769a(10) =-5739a(11) =18866a(12) =-62684a(13) =210146a(14) =-709882a(15) =2413743a(16) =-8253995a(17) =28366316a(18) =-97916761a(19) =339326189a(20) =-1180068800a(21) =4116957243a(22) =-14404398636a(23) =50530280752a(24) =-177684095927a(25) =626181400993
External references
- oeis: A084204