Expansion of g.f. 1 - 2*x*(-7 - 10*x + x^2)/(x - 1)^4.

Terms

a(0) =1a(1) =14a(2) =76a(3) =218a(4) =472a(5) =870a(6) =1444a(7) =2226a(8) =3248a(9) =4542a(10) =6140a(11) =8074a(12) =10376a(13) =13078a(14) =16212a(15) =19810a(16) =23904a(17) =28526a(18) =33708a(19) =39482a(20) =45880a(21) =52934a(22) =60676a(23) =69138a(24) =78352a(25) =88350a(26) =99164a(27) =110826a(28) =123368a(29) =136822