Inverse of number-theoretic triangle A109974.

Terms

a(0) =1a(1) =-2a(2) =1a(3) =4a(4) =-3a(5) =1a(6) =-15a(7) =11a(8) =-5a(9) =1a(10) =107a(11) =-76a(12) =35a(13) =-9a(14) =1a(15) =-1475a(16) =1041a(17) =-476a(18) =125a(19) =-17a(20) =1a(21) =40914a(22) =-28858a(23) =13177a(24) =-3460a(25) =479a(26) =-33a(27) =1a(28) =-2327019a(29) =1641270