Inverse Euler transform of n^2.

Terms

a(0) =1a(1) =3a(2) =5a(3) =1a(4) =-6a(5) =-17a(6) =-4a(7) =29a(8) =56a(9) =7a(10) =-158a(11) =-255a(12) =56a(13) =878a(14) =1234a(15) =-725a(16) =-4966a(17) =-5852a(18) =6132a(19) =28410a(20) =26932a(21) =-46529a(22) =-162814a(23) =-117479a(24) =332350a(25) =929292a(26) =454328a(27) =-2279218a(28) =-5259270a(29) =-1252181