Main diagonal of A292159.

Terms

a(0) =1a(1) =-1a(2) =-4a(3) =-18a(4) =-32a(5) =-75a(6) =1188a(7) =2205a(8) =7936a(9) =19278a(10) =49500a(11) =87120a(12) =185760a(13) =312988a(14) =574868a(15) =-10481175a(16) =-15271936a(17) =-46022672a(18) =-98470404a(19) =-230150496a(20) =-440484000a(21) =-932930208a(22) =-1572331596a(23) =-2940575576a(24) =-4940815104a(25) =-8508211250a(26) =-13542949524a(27) =-22406625648