OFFSET
1,2
LINKS
F. J. van de Bult, D. C. Gijswijt, J. P. Linderman, N. J. A. Sloane and Allan Wilks, A Slow-Growing Sequence Defined by an Unusual Recurrence, J. Integer Sequences, Vol. 10 (2007), #07.1.2.
FORMULA
a(1) = 1; for n > 1, a(n+1) = 2*a(n) + A091839(n).
This roughly doubles at each step and a(n) -> 1.5317006328915480... * 2^n.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jul 10 2004
STATUS
approved