A111438 Fibonacci(heptanacci(n)), restricted to nonzero heptanacci numbers.

1, 1, 1, 3, 21, 987, 2178309, 10610209857723, 155576970220531065681649693, 33449372971981195681356806732944396691005381570580873

Offset

0,4

Links

Table of n, a(n) for n=0..9.

Formula

a(n) = A000045(A066178(n)).

Example

a(0) = Fibonacci(heptanacci(0)) = A000045(A066178(0)) = A000045(1) = 1.
a(1) = Fibonacci(heptanacci(1)) = A000045(A066178(1)) = A000045(1) = 1.
a(2) = Fibonacci(heptanacci(2)) = A000045(A066178(2)) = A000045(2) = 1.
a(3) = Fibonacci(heptanacci(3)) = A000045(A066178(3)) = A000045(4) = 3.
a(4) = Fibonacci(heptanacci(4)) = A000045(A066178(4)) = A000045(8) = 21.
a(5) = Fibonacci(heptanacci(5)) = A000045(A066178(5)) = A000045(16) = 987.
a(6) = A000045(A066178(6)) = A000045(32) = 2178309.
a(7) = A000045(A066178(7)) = A000045(64) = 10610209857723.
a(8) = A000045(A066178(8)) = A000045(127) = 155576970220531065681649693.

Crossrefs

Cf. A000045, A001592, A066178, A007570.

Sequence in context: A288568 A111433 A111435 * A058635 A077260 A367999

Adjacent sequences: A111435 A111436 A111437 * A111439 A111440 A111441

Keyword

easy,nonn

Author

Jonathan Vos Post, Nov 14 2005

Extensions

Corrected by T. D. Noe, Nov 16 2006

Status

approved