Matrix cube of triangle A113340.

Terms

a(0) =1a(1) =3a(2) =1a(3) =12a(4) =9a(5) =1a(6) =69a(7) =81a(8) =15a(9) =1a(10) =560a(11) =879a(12) =210a(13) =21a(14) =1a(15) =6059a(16) =11739a(17) =3285a(18) =399a(19) =27a(20) =1a(21) =83215a(22) =190044a(23) =59395a(24) =8127a(25) =648a(26) =33a(27) =1a(28) =1399161a(29) =3654814