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!)
A283109 Increase in the number of free polyominoes from order n to n+1. 0
0, 0, 1, 3, 7, 23, 73, 261, 916, 3370, 12418, 46527, 174991, 663380, 2524605, 9652679, 37028654, 142514143, 550002180, 2128047718, 8252388728, 32068797010, 124855150040, 486952692675, 1902227344361, 7441861777311, 29153922116412, 114358089656116 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..27.

FORMULA

a(n) = A000105(n+1) - A000105(n).

CROSSREFS

Cf. A000105.

Sequence in context: A228724 A191638 A148704 * A057184 A148705 A148706

Adjacent sequences:  A283106 A283107 A283108 * A283110 A283111 A283112

KEYWORD

nonn

AUTHOR

Francois Alcover, Feb 28 2017

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 May 26 22:58 EDT 2020. Contains 334634 sequences. (Running on oeis4.)