A111429 Tribonacci(hexanacci(n)).

0, 0, 0, 0, 0, 0, 0, 1, 2, 24, 3136, 53798080, 8607945812375585, 220376367601372354229355484029120, 78531983922879942351416192215114163135375656803468317366190276600

Offset: 0

Author

Jonathan Vos Post, Nov 13 2005

Keywords

• easy
• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..17

Crossrefs

Cf. A000045, A000073, A001592, A007570.

Programs

Maple

a:= n-> (<<0|1|0>, <0|0|1>, <1|1|1>>^((<<0|1|0|0|0|0>, <0|0|1|0|0|0>,
    <0|0|0|1|0|0>, <0|0|0|0|1|0>, <0|0|0|0|0|1>, <1|1|1|1|1|1>>^n)[1, 6]))[1, 3]:
seq(a(n), n=0..14);  # Alois P. Heinz, Nov 07 2018

Formula

a(n) = A000073(A001592(n)).