G.f.: (1 + x + 3*x^2 + 11*x^3 + 6*x^4 + 14*x^5 + 12*x^6 + 4*x^7 + 14*x^8 + 4*x^9 + 12*x^10 + 14*x^11 + 5*x^ 12 + 11*x^13 + 9*x^14 - 11*x^15)/((1 - x)^4*(1 - x^2)^12).
A268244
G.f.: (1 + x + 3*x^2 + 11*x^3 + 6*x^4 + 14*x^5 + 12*x^6 + 4*x^7 + 14*x^8 + 4*x^9 + 12*x^10 + 14*x^11 + 5*x^ 12 + 11*x^13 + 9*x^14 - 11*x^15)/((1 - x)^4*(1 - x^2)^12).
Terms
- a(0) =1a(1) =5a(2) =29a(3) =113a(4) =417a(5) =1325a(6) =3903a(7) =10611a(8) =26992a(9) =65102a(10) =148760a(11) =326638a(12) =686687a(13) =1398339a(14) =2748667a(15) =5261985a(16) =9784309a(17) =17789319a(18) =31564911a(19) =54933111a(20) =93643702a(21) =156953854a(22) =258427234a(23) =419200178a(24) =669550440a(25) =1055313420a(26) =1640871008a(27) =2521204924a(28) =3827438242a(29) =5748603482
External references
- oeis: A268244