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A173451 a(n) = A048883(n-1) - A160121(n). 5
0, 0, 0, 0, 0, 0, 0, 6, -6, 0, 0, 6, -6, 6, 0, 30, -24, 0, 0, 6, -6, 6, 0, 30, -24, 6, 0, 30, -24, 24, 12, 126, -78, -12, 0, 6, -6, 6, 0, 30, -24, 6, 0, 30, -24, 24, 12, 126, -78, -6, 0, 30, -24, 24, 6, 114, -90, 6, 12, 126, -54, 102, 72, 450, -228, -60, 0, 6, -6, 6, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,8
COMMENTS
It appears that the absolute value of a(n) is a multiple of 6, see A008588. - Omar E. Pol, Dec 06 2013
LINKS
David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.]
EXAMPLE
From Omar E. Pol, Dec 06 2013: (Start)
Written as an irregular triangle in which row lengths is A011782 the sequence begins:
. 0;
. 0;
. 0, 0;
. 0, 0,0,6;
. -6, 0,0,6,-6,6,0,30;
. -24, 0,0,6,-6,6,0,30,-24,6,0,30,-24,24,12,126;
. -78,-12,0,6,-6,6,0,30,-24,6,0,30,-24,24,12,126,-78,-6,0,30,-24,24,6,114,-90,6,12,126,-54,102,72,450;
. -228,-60,0,6,-6,6,0...
(End)
CROSSREFS
Sequence in context: A020845 A238291 A028971 * A318537 A006806 A002892
KEYWORD
sign,tabf
AUTHOR
Omar E. Pol, May 29 2010
EXTENSIONS
More terms from Nathaniel Johnston, Nov 15 2010
STATUS
approved

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Last modified July 23 03:47 EDT 2024. Contains 374544 sequences. (Running on oeis4.)