The sum of the coefficients of x^k in the expansion of (x + x^2 + x^3 + x^4 + x^5 + x^6)^n with k divisible by 4.

A362365

The sum of the coefficients of x^k in the expansion of (x + x^2 + x^3 + x^4 + x^5 + x^6)^n with k divisible by 4.

Terms

    a(0) =1a(1) =9a(2) =55a(3) =322a(4) =1946a(5) =11664a(6) =69980a(7) =419912a(8) =2519416a(9) =15116544a(10) =90699280a(11) =544195552a(12) =3265173536a(13) =19591041024a(14) =117546246080a(15) =705277476992

External references