G.f. is the polynomial (1-x^3) * (1-x^6) * (1-x^9) * (1-x^12) * (1-x^15) * (1-x^18) * (1-x^21) * (1-x^24) * (1-x^27) * (1-x^30) * (1-x^33) * (1-x^36) / (1-x)^12.
A162629
G.f. is the polynomial (1-x^3) * (1-x^6) * (1-x^9) * (1-x^12) * (1-x^15) * (1-x^18) * (1-x^21) * (1-x^24) * (1-x^27) * (1-x^30) * (1-x^33) * (1-x^36) / (1-x)^12.
Terms
- a(0) =1a(1) =12a(2) =78a(3) =363a(4) =1353a(5) =4290a(6) =12011a(7) =30447a(8) =71136a(9) =155220a(10) =319527a(11) =625482a(12) =1171742a(13) =2111604a(14) =3676386a(15) =6206123a(16) =10189047a(17) =16311426a(18) =25519416a(19) =39094626a(20) =58745103a(21) =86713407a(22) =125903361a(23) =180026925a(24) =253772454a(25) =352995357a(26) =484931877a(27) =658436362
External references
- oeis: A162629