Main diagonal of triangle A119937.

Terms

a(0) =3a(1) =5a(2) =7a(3) =81a(4) =44a(5) =1300a(6) =3375a(7) =20825a(8) =14896a(9) =1333584a(10) =1014300a(11) =133402500a(12) =105850800a(13) =85395024a(14) =279558279a(15) =66958716825a(16) =56112056000