A158569 a(n) = Sum_{i=1..F(n)} F(i), n >= 1, where F(k) is A000045, Fibonacci numbers.

1, 1, 2, 4, 12, 54, 609, 28656, 14930351, 365435296161, 4660046610375530308, 1454489111232772683678306641952, 5789092068864820527338372482892113982249794889764

Offset

1,3

Comments

a(14) has 79 digits. - Emeric Deutsch, Apr 05 2009

Links

Table of n, a(n) for n=1..13.

Maple

with(combinat); a := proc (n) options operator, arrow: add(fibonacci(i), i = 1 .. fibonacci(n)) end proc: seq(a(n), n = 1 .. 13); # Emeric Deutsch, Apr 05 2009

Mathematica

Total/@Table[Sum[Fibonacci[Range[i]], {i, {Fibonacci[n]}}], {n, 14}] (* Harvey P. Dale, Aug 26 2013 *)

Crossrefs

Cf. A000045.

Sequence in context: A222470 A372347 A227037 * A020106 A099928 A363005

Adjacent sequences: A158566 A158567 A158568 * A158570 A158571 A158572

Keyword

easy,nonn

Author

Ctibor O. Zizka, Mar 21 2009

Extensions

More terms from Emeric Deutsch, Apr 05 2009

Status

approved