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A119532 Number of n-ominoes plus number of n-iamonds. 0
2, 2, 2, 3, 8, 16, 47, 132, 435, 1445, 5103, 18259, 66934, 247826, 928137, 3500559, 13290552, 50712016, 194358380, 747624825, 2885120934, 11164896416, 43313276948, 168400053019, 656028153120, 2560227845391, 10007858038797 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

COMMENTS

Number of polyominoes with n cells plus number of polyiamonds with n cells. Turning over is allowed; holes are allowed.

FORMULA

a(n) = A000105(n) + A000577(n).

CROSSREFS

Cf. A000105, A000577.

Sequence in context: A101360 A184311 A110910 * A010583 A051007 A071470

Adjacent sequences:  A119529 A119530 A119531 * A119533 A119534 A119535

KEYWORD

nonn

AUTHOR

Jonathan Vos Post (jvospost3(AT)gmail.com), May 28 2006

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Last modified February 14 18:47 EST 2012. Contains 205663 sequences.