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A151519 Number of 1-sided polytans (polyaboloes) with n cells. 1
1, 4, 6, 22, 56, 198, 624, 2182, 7448, 26319, 92826, 332181, 1192845, 4315845, 14778200 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..15.

Ed Pegg, Jr., Illustrations of polyforms

Eric Weisstein's World of Mathematics, Polytan

CROSSREFS

Cf. A006074.

Sequence in context: A083157 A192154 A289385 * A061595 A062940 A061596

Adjacent sequences:  A151516 A151517 A151518 * A151520 A151521 A151522

KEYWORD

nonn,hard,more

AUTHOR

Ed Pegg Jr, May 13 2009

EXTENSIONS

Added a(13) and a(14). - George Sicherman, Sep 27 2012

Added a(15). - George Sicherman, Aug 06 2013

STATUS

approved

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Last modified August 10 12:19 EDT 2020. Contains 336379 sequences. (Running on oeis4.)