A091411 Lengths of the B blocks in analysis of A090822.

1, 3, 9, 19, 47, 98, 220, 441, 885, 1771, 3551, 7106, 14279, 28559, 57121, 114243, 228495, 456994, 914012, 1828025, 3656053, 7312107, 14624223, 29248450, 58497096, 116994195, 233988391, 467976791, 935953586, 1871907196

Offset

1,2

Comments

Also, values of len_y(n) when len_x(n) = 0 in A090822.

Links

Table of n, a(n) for n=1..30.

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.

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 [pdf, ps].

Index entries for sequences related to Gijswijt's sequence

Formula

a(1) = 1; for n > 1, a(n+1) = 2*a(n) + A091579(n).

This roughly doubles at each step and a(n) -> 1.743349432191828... * 2^n.

Crossrefs

Cf. A090822, A091579, A091410, A095828.

Sequence in context: A095828 A028377 A147439 * A279682 A102001 A146901

Adjacent sequences: A091408 A091409 A091410 * A091412 A091413 A091414

Keyword

nonn

Author

N. J. A. Sloane, Mar 04 2004

Extensions

14279 and 28559 from Allan Wilks, Mar 04 2004

Extended by N. J. A. Sloane, Mar 06 2004

Status

approved