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Search: id:A034186
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A034186 Number of symmetric n x 4 crossword puzzle grids. +0
1
1, 3, 21, 47, 227, 499, 2321, 5087, 23429, 51263, 235881, 515691, 2372511, 5185609, 23856215, 52139887, 239863701, 524238555, 2411688233, 5270900439, 24248031407, 52995614649 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Cf. A001333, A034184-A034187.

Sequence in context: A076169 A056387 A056377 this_sequence A027499 A039595 A033567

Adjacent sequences: A034183 A034184 A034185 this_sequence A034187 A034188 A034189

KEYWORD

nonn

AUTHOR

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

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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