Triangle, read by rows, T(n,k) = t(n-k, k) where t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1) and f(x) = 7*x + 3.

A257627

Triangle, read by rows, T(n,k) = t(n-k, k) where t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1) and f(x) = 7*x + 3.

Terms

    a(0) =1a(1) =3a(2) =3a(3) =9a(4) =60a(5) =9a(6) =27a(7) =753a(8) =753a(9) =27a(10) =81a(11) =8178a(12) =25602a(13) =8178a(14) =81a(15) =243a(16) =84291a(17) =631506a(18) =631506a(19) =84291a(20) =243a(21) =729a(22) =852144a(23) =13348623a(24) =30312288a(25) =13348623a(26) =852144a(27) =729a(28) =2187a(29) =8554245

External references