Row sums of triangle A144881 (S1hat(3)) and of array A144880 (M31hat(3)).

A144882

Row sums of triangle A144881 (S1hat(3)) and of array A144880 (M31hat(3)).

Terms

    a(0) =1a(1) =4a(2) =16a(3) =85a(4) =481a(5) =3352a(6) =25420a(7) =223393a(8) =2157565a(9) =23241244a(10) =272933680a(11) =3496821133a(12) =48307202761a(13) =717473918560

External references