2136122domain: NAppears in sequencesFibonacci sequence beginning 4, 26.at n=25A022386Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2), where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4.at n=27A293076