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A283110 Increase in the number of fixed polyominoes from order n to order n+1. 0
0, 1, 4, 13, 44, 153, 544, 1965, 7185, 26536, 98822, 370593, 1398029, 5300984, 20189792, 77198271, 296202907, 1140024698, 4399918134, 17024040984, 66018733123, 256549059895, 998839762846, 3895616434744, 15217813245743, 59534874351097, 233231355731136, 914864639728729 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

FORMULA

a(n) = A001168(n+1) - A001168(n); this holds for n=0 if A001168(0) is set conventionnaly to 1, like it is done for free polyominoes in A000105. We say there are exactly 1 fixed polyominoes of order 0.

CROSSREFS

Cf. A001168.

Sequence in context: A290907 A252933 A229397 * A149428 A149429 A045652

Adjacent sequences:  A283107 A283108 A283109 * A283111 A283112 A283113

KEYWORD

nonn

AUTHOR

Francois Alcover, Feb 28 2017

STATUS

approved

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