Diagonal above central terms of pendular trinomial triangle A122445, ignoring leading zeros.

A122450

Diagonal above central terms of pendular trinomial triangle A122445, ignoring leading zeros.

Terms

    a(0) =1a(1) =3a(2) =12a(3) =47a(4) =189a(5) =773a(6) =3208a(7) =13478a(8) =57222a(9) =245134a(10) =1058348a(11) =4600571a(12) =20118753a(13) =88450897a(14) =390721560a(15) =1733348234a(16) =7719287578a(17) =34497374034a(18) =154659735720a(19) =695397289078

External references