login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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; text; 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.

LINKS

Table of n, a(n) for n=0..26.

FORMULA

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

CROSSREFS

Cf. A000105, A000577.

Sequence in context: A270371 A184311 A110910 * A010583 A306343 A238188

Adjacent sequences:  A119529 A119530 A119531 * A119533 A119534 A119535

KEYWORD

nonn

AUTHOR

Jonathan Vos Post, May 28 2006

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 20 22:47 EST 2020. Contains 332086 sequences. (Running on oeis4.)