a(n) = IntegerPart(PolyGamma(n, 3)).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =-2a(8) =6a(9) =-21a(10) =77a(11) =-308a(12) =1326a(13) =-6159a(14) =30691a(15) =-163262a(16) =923364a(17) =-5532187a(18) =34999420a(19) =-233141556a(20) =1631008138a(21) =-11955337672a(22) =91626679088a(23) =-732828332694