Triangle read by rows: cube of the lower triangular mean matrix.

Terms

a(0) =1a(1) =7a(2) =1a(3) =85a(4) =19a(5) =4a(6) =415a(7) =115a(8) =37a(9) =9a(10) =12019a(11) =3799a(12) =1489a(13) =549a(14) =144a(15) =13489a(16) =4669a(17) =2059a(18) =919a(19) =364a(20) =100a(21) =726301a(22) =268921a(23) =128431a(24) =64171a(25) =30676a(26) =12700a(27) =3600a(28) =3144919a(29) =1227199