Triangle of quadrinomial coefficients, row n is the sequence of coefficients of (1 + x + x^2 + x^3)^n.
A008287
Triangle of quadrinomial coefficients, row n is the sequence of coefficients of (1 + x + x^2 + x^3)^n.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =2a(7) =3a(8) =4a(9) =3a(10) =2a(11) =1a(12) =1a(13) =3a(14) =6a(15) =10a(16) =12a(17) =12a(18) =10a(19) =6a(20) =3a(21) =1a(22) =1a(23) =4a(24) =10a(25) =20a(26) =31a(27) =40a(28) =44a(29) =40
External references
- oeis: A008287