|
Search: id:A151555
|
|
|
| A151555 |
|
G.f.: (1 + 2x ) * Prod_{ n >= 1} (1 + x^(2^n-1) + 2*x^(2^n)). |
|
+0
4
|
|
| 1, 3, 4, 5, 5, 10, 12, 9, 5, 10, 13, 15, 20, 32, 32, 17, 5, 10, 13, 15, 20, 32, 33, 23, 20, 33, 41, 50, 72, 96, 80, 33, 5, 10, 13, 15, 20, 32, 33, 23, 20, 33, 41, 50, 72, 96, 81, 39, 20, 33, 41, 50, 72, 97, 89, 66, 73, 107, 132, 172, 240, 272, 192, 65, 5, 10, 13, 15, 20, 32, 33, 23
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Contribution from Gary W. Adamson (qntmpkt(AT)yahoo.com), May 25 2009: (Start)
Convolved with A078008 signed (A151575) [1, 0, 2, -2, 6, -10, 22, -42, 86, -170,...]
equals the toothpick sequence A153006: (1, 3, 6, 9, 13, 20, 28,...). (End)
If A151550 is written as a triangle then the rows converge to this sequence. - N. J. A. Sloane, Jun 16 2009
|
|
LINKS
|
N. J. A. Sloane, Table of n, a(n) for n = 0..16384
|
|
EXAMPLE
|
Contribution from Omar E. Pol (info(AT)polprimos.com), Jun 19 2009: (Start)
May be written as a triangle:
1;
3;
4,5;
5,10,12,9;
5,10,13,15,20,32,32,17;
5,10,13,15,20,32,33,23,20,33,41,50,72,96,80,33;
5,10,13,15,20,32,33,23,20,33,41,50,72,96,81,39,20,33,41,50,72,97,89,66,73,...
(End)
|
|
CROSSREFS
|
Cf. A139250, A151551, A151552, A151553, A151554, A151550, A152980, A153006.
Cf. A078008 [From Gary W. Adamson (qntmpkt(AT)yahoo.com), May 25 2009]
Sequence in context: A024357 A130271 A139369 this_sequence A103606 A139794 A004484
Adjacent sequences: A151552 A151553 A151554 this_sequence A151556 A151557 A151558
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com), May 20 2009
|
|
|
Search completed in 0.002 seconds
|
