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A094172 Number of quasi-pentominoes in an n X n bounding box. 5
0, 0, 0, 21, 390, 3427, 18380, 73413, 237459, 659774, 1629116, 3666785, 7651680 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..12.

Erich Friedman, Illustration of initial terms

EXAMPLE

See A094170 for example of similar sequence.

CROSSREFS

Cf. A094170, A094171.

Sequence in context: A001881 A240683 A108740 * A145613 A212786 A015677

Adjacent sequences:  A094169 A094170 A094171 * A094173 A094174 A094175

KEYWORD

nonn

AUTHOR

Jon Wild, May 07 2004

EXTENSIONS

Corrected and extended by Jon Wild, May 11 2004

STATUS

approved

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Last modified September 18 17:06 EDT 2014. Contains 246924 sequences.