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A171171 Corner sequence (starting each round with the corner (SE): 1,2,3). 1
1, 2, 3, 4, 1, 2, 3, 2, 3, 4, 3, 4, 1, 4, 1, 2, 1, 2, 3, 2, 3, 4, 3, 4, 1, 4, 1, 2, 1, 2, 3, 2, 3, 4, 1, 2, 3, 2, 3, 4, 3, 4, 1, 2, 3, 4, 3, 4, 1, 4, 1, 2, 3, 4, 1, 4, 1, 2, 1, 2, 3, 4, 1, 2, 1, 2, 3, 2, 3, 4, 3, 4, 1, 4, 1, 2, 1, 2, 3, 2, 3, 4, 1, 2, 3, 2, 3, 4, 3, 4, 1, 2, 3, 4, 3, 4, 1, 4, 1, 2, 3, 4, 1, 4, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A161411, which is the main entry for this sequence.

See also A171170 for another version.

LINKS

Table of n, a(n) for n=1..105.

David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

EXAMPLE

================

.......41.......

.......32.......

================

......4141......

......3..2......

......4..1......

......3232......

================

.....41..41.....

.....3....2.....

................

................

.....4....1.....

.....32..32.....

================

....41414141....

....3..23..2....

....4......1....

....32....32....

....41....41....

....3......2....

....4..14..1....

....32323232....

================

...41......41...

...3........2...

................

................

................

................

................

................

................

...4........1...

...32......32...

================

And so on.

Triangle begins:

1,2,3,4;

1,2,3, 2,3,4, 3,4,1, 4,1,2;

1,2,3, 2,3,4, 3,4,1, 4,1,2;

1,2,3,2,3,4,1,2,3, 2,3,4,3,4,1,2,3,4, 3,4,1,4,1,2,3,4,1, 4,1,2,1,2,3,4,1,2;

1,2,3, 2,3,4, 3,4,1, 4,1,2;

1,2,3,2,3,4,1,2,3, 2,3,4,3,4,1,2,3,4, 3,4,1,4,1,2,3,4,1, 4,1,2,1,2,3,4,1,2;

Contribution from Omar E. Pol, Dec 09 2009: (Start)

Illustration for n = 1..148

================

.41..41..41..41.

.341412..341412.

..3412....3412..

..434141414121..

.43234123412321.

.32.43414121.32.

....32341232....

....41432141....

.41.34323212.41.

.34143214321412.

..343232323212..

..4321....4321..

.432321..432321.

.32..32..32..32.

================

(End)

CROSSREFS

Cf. A139250, A139251, A160410, A161411, A171170.

Sequence in context: A214063 A078978 A256914 * A159957 A053840 A010883

Adjacent sequences:  A171168 A171169 A171170 * A171172 A171173 A171174

KEYWORD

nonn,tabf

AUTHOR

Omar E. Pol, Dec 04 2009

STATUS

approved

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Last modified October 16 00:50 EDT 2018. Contains 316252 sequences. (Running on oeis4.)