G.f. satisfies A(x) = 1 + x/(1 + x^4) * A(x/(1 + x^4)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =0a(6) =-2a(7) =-5a(8) =-9a(9) =-13a(10) =-10a(11) =10a(12) =60a(13) =155a(14) =281a(15) =325a(16) =5a(17) =-1214a(18) =-4094a(19) =-8786a(20) =-12571a(21) =-5642a(22) =35339a(23) =149264a(24) =363838a(25) =596714a(26) =417156a(27) =-1373639a(28) =-7048541a(29) =-18932245