a(n) = (46^n - 1)/45.A218749a(n) = (46^n - 1)/45.Terms a(0) =0a(1) =1a(2) =47a(3) =2163a(4) =99499a(5) =4576955a(6) =210539931a(7) =9684836827a(8) =445502494043External referencesoeis: A218749