A111432 Fibonacci(tetranacci(n)).

0, 0, 0, 1, 1, 1, 3, 21, 610, 514229, 225851433717, 16641027750620563662096, 13180872826374098837632191485015125807374171, 284812298108489611757988937681460995615380088782304890986477195645969271404032323901

Offset

0,7

Links

Table of n, a(n) for n=0..13.

Formula

a(n) = A000045(A000078(n)).

Example

a(0) = Fibonacci(tetranacci(0)) = A000045(A000078(0)) = A000045(0) = 0.
a(1) = Fibonacci(tetranacci(1)) = A000045(A000078(1)) = A000045(0) = 0.
a(2) = Fibonacci(tetranacci(2)) = A000045(A000078(2)) = A000045(0) = 0.
a(3) = Fibonacci(tetranacci(3)) = A000045(A000078(3)) = A000045(1) = 1.
a(4) = Fibonacci(tetranacci(4)) = A000045(A000078(4)) = A000045(1) = 1.
a(5) = A000045(A000078(5)) = A000045(2) = 1.
a(6) = A000045(A000078(6)) = A000045(4) = 3.
a(7) = A000045(A000078(7)) = A000045(8) = 21.
a(8) = A000045(A000078(8)) = A000045(15) = 610.
a(9) = A000045(A000078(9)) = A000045(29) = 514229.
a(10) = A000045(A000078(10)) = A000045(56) = 225851433717.

Mathematica

Fibonacci[LinearRecurrence[{1, 1, 1, 1}, {0, 0, 0, 1}, 14]] (* Harvey P. Dale, Aug 03 2017 *)

Crossrefs

Cf. A000045, A000078, A066178, A007570.

Sequence in context: A135327 A128679 A292331 * A180999 A181003 A093549

Adjacent sequences: A111429 A111430 A111431 * A111433 A111434 A111435

Keyword

easy,nonn

Author

Jonathan Vos Post, Nov 13 2005

Status

approved