References to A083839

G.f.: ( x - 3*x^2 + 6*x^3 - 8*x^4 + 4*x^5 - x^7 ) / (1 - 4*x + 6*x^2 - 5*x^3 + 2*x^4 + x^5 - x^6 + x^7 ).
0, 1, 1, 4, 7, 11, 19, 36, 67, 121, 216, 386, 691, 1236, 2206, 3929, 6987, 12411

1 seqfan posts