A111427 Tribonacci(tetranacci(n)).

0, 0, 0, 0, 0, 1, 2, 24, 1705, 8646064, 120879712950776, 6984325661199418257711189170, 2037364946117781220616409939151494028465982215442078400

Offset

0,7

Links

Alois P. Heinz, Table of n, a(n) for n = 0..16

Formula

a(n) = A000073(A000078(n)).

Maple

a:= n-> (<<0|1|0>, <0|0|1>, <1|1|1>>^((<<0|1|0|0>,
        <0|0|1|0>, <0|0|0|1>, <1|1|1|1>>^n)[1, 4]))[1, 3]:
seq(a(n), n=0..12);  # Alois P. Heinz, Nov 07 2018

Crossrefs

Cf. A000045, A000073, A000078, A007570.

Sequence in context: A094050 A000479 A181231 * A081955 A292797 A163086

Adjacent sequences: A111424 A111425 A111426 * A111428 A111429 A111430

Keyword

easy,nonn

Author

Jonathan Vos Post, Nov 13 2005

Status

approved