A sequence of row differences for table A182119.

Terms

a(0) =1a(1) =-1a(2) =-11a(3) =-69a(4) =-407a(5) =-2377a(6) =-13859a(7) =-80781a(8) =-470831a(9) =-2744209a(10) =-15994427a(11) =-93222357a(12) =-543339719a(13) =-3166815961a(14) =-18457556051a(15) =-107578520349a(16) =-627013566047