Coefficient of x^n in the expansion of ( (1-x+x^5) / (1-x) )^n.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =5a(6) =6a(7) =7a(8) =8a(9) =9a(10) =55a(11) =121a(12) =210a(13) =325a(14) =469a(15) =1100a(16) =2536a(17) =5185a(18) =9555a(19) =16264a(20) =30895a(21) =63721a(22) =131615a(23) =260360a(24) =487394a(25) =918155a(26) =1793051a(27) =3589470a(28) =7169365a(29) =13984699