Fifth right hand column of the RSEG2 triangle A161739.

Terms

a(0) =-4a(1) =-14a(2) =1561a(3) =25809a(4) =218769a(5) =1284261a(6) =5885671a(7) =22482031a(8) =74581507a(9) =220977757a(10) =596666070a(11) =1490430630a(12) =3484310310a(13) =7693206894a(14) =16160890914a(15) =32492871698a(16) =62838521438a(17) =117376191548a(18) =212507783895a(19) =374035542815a(20) =641676187295