A134663 Triangle read by rows in which n-th row gives the expansion coefficients of (1+x+x^4)^n.

1, 1, 1, 0, 0, 1, 1, 2, 1, 0, 2, 2, 0, 0, 1, 1, 3, 3, 1, 3, 6, 3, 0, 3, 3, 0, 0, 1, 1, 4, 6, 4, 5, 12, 12, 4, 6, 12, 6, 0, 4, 4, 0, 0, 1, 1, 5, 10, 10, 10, 21, 30, 20, 15, 30, 30, 10, 10, 20, 10, 0, 5, 5, 0, 0, 1, 1, 6, 15, 20, 21, 36, 61, 60, 45, 66, 90, 60, 35, 60, 60, 20, 15, 30, 15, 0, 6, 6, 0

Offset: 0

Author

Steven Finch, Jan 25 2008

Keywords

• nonn
• tabf

Comments

The n-th row has 4n+1 entries.

Links

• S. R. Finch, P. Sebah and Z.-Q. Bai, Odd Entries in Pascal's Trinomial Triangle (arXiv:0802.2654)

Crossrefs

Cf. A027907, A038717.

Programs

Mathematica

CoefficientList[(1+x+x^4)^n, x]