Expansion of 1/((1-2x)(1-4x)(1-5x)(1-6x)).

Terms

a(0) =1a(1) =17a(2) =185a(3) =1645a(4) =13041a(5) =96117a(6) =674185a(7) =4565165a(8) =30122081a(9) =194911717a(10) =1242462585a(11) =7828123485a(12) =48869031121a(13) =302849847317