A111430 Tribonacci(heptanacci(n)).

0, 0, 1, 2, 24, 3136, 53798080, 15832480722303616, 745527911414639917440582097294401, 1653079675982713719400420113305863285438472194540328413077493166464

Offset: 0

Author

Jonathan Vos Post, Nov 13 2005

Keywords

• easy
• nonn

Examples

			Heptanacci(10) = A066178(10) = 504, so tribonacci(heptanacci(10)) =
A000073(504) ~ 4.4 * 10^133.
		

Crossrefs

Cf. A000073, A066178, A007570.

Formula

a(n) = A000073(A066178(n)).