First column of A078939, the fourth power of lower triangular matrix A056857.

A078944

First column of A078939, the fourth power of lower triangular matrix A056857.

Terms

    a(0) =1a(1) =4a(2) =20a(3) =116a(4) =756a(5) =5428a(6) =42356a(7) =355636a(8) =3188340a(9) =30333492a(10) =304716148a(11) =3218555700a(12) =35618229364a(13) =411717043252

External references