Expansion of 1/((1-x)(1-3x)(1-7x)(1-9x)).

A021594

Expansion of 1/((1-x)(1-3x)(1-7x)(1-9x)).

Terms

    a(0) =1a(1) =20a(2) =270a(3) =3100a(4) =32711a(5) =328440a(6) =3195340a(7) =30437000a(8) =285695421a(9) =2653625260a(10) =24459281210a(11) =224170373700

External references