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Search: id:A034184
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A034184 Not necessarily symmetric n x 3 crossword puzzle grids. +0
4
1, 15, 111, 649, 3495, 18189, 93231, 474479, 2406621, 12187137, 61668609, 311938233, 1577602849, 7977940187, 40342860995, 204001993697, 1031568839407, 5216271035257, 26376744398811, 133377264694375 (list; graph; listen)
OFFSET

1,2

FORMULA

Appears to obey a 9-term linear recurrence. - R. Stephan, May 05 2004

CROSSREFS

Cf. A001333, A034184-A034187.

Sequence in context: A060931 A107585 A054367 this_sequence A092646 A105040 A105051

Adjacent sequences: A034181 A034182 A034183 this_sequence A034185 A034186 A034187

KEYWORD

nonn

AUTHOR

Erich Friedman (erich.friedman(AT)stetson.edu)

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.


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