|
%I #8 Nov 07 2018 20:09:23
%S 0,0,0,0,0,1,2,24,1705,8646064,120879712950776,
%T 6984325661199418257711189170,
%U 2037364946117781220616409939151494028465982215442078400
%N Tribonacci(tetranacci(n)).
%H Alois P. Heinz, <a href="/A111427/b111427.txt">Table of n, a(n) for n = 0..16</a>
%F a(n) = A000073(A000078(n)).
%p a:= n-> (<<0|1|0>, <0|0|1>, <1|1|1>>^((<<0|1|0|0>,
%p <0|0|1|0>, <0|0|0|1>, <1|1|1|1>>^n)[1, 4]))[1, 3]:
%p seq(a(n), n=0..12); # _Alois P. Heinz_, Nov 07 2018
%Y Cf. A000045, A000073, A000078, A007570.
%K easy,nonn
%O 0,7
%A _Jonathan Vos Post_, Nov 13 2005
|
