a(n) = [x^n] 1/(1 + x + x^2 + x^3 + x^4)^n.

Terms

a(0) =1a(1) =-1a(2) =1a(3) =-1a(4) =1a(5) =4a(6) =-35a(7) =146a(8) =-447a(9) =1133a(10) =-2464a(11) =4355a(12) =-4355a(13) =-9296a(14) =77078a(15) =-314636a(16) =1006145a(17) =-2738565a(18) =6398155a(19) =-12175809a(20) =14621376a(21) =14828330a(22) =-179236815a(23) =786257460a(24) =-2625667395a(25) =7412386254a(26) =-17983703880a(27) =36057065030a(28) =-49553122730a(29) =-14585596720