Expansion of 1/((1-x)^7 - x^7).

Terms

a(0) =1a(1) =7a(2) =28a(3) =84a(4) =210a(5) =462a(6) =924a(7) =1717a(8) =3017a(9) =5110a(10) =8568a(11) =14756a(12) =27132a(13) =54264a(14) =116281a(15) =257775a(16) =572264a(17) =1246784a(18) =2641366a(19) =5430530a(20) =10861060a(21) =21242341a(22) =40927033a(23) =78354346a(24) =150402700a(25) =291693136a(26) =574274008a(27) =1148548016a(28) =2326683921a(29) =4749439975