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A070764 Number of polyiamonds with n cells, with holes. 3
0, 0, 0, 0, 0, 0, 0, 0, 1, 4, 25, 108, 450, 1713, 6267, 21988, 75185, 251590, 828408, 2692630, 8661287, 27624040, 87479663, 275392248, 862593661, 2690285608, 8359581585, 25893044920, 79978118632, 246433568617 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,10

LINKS

Table of n, a(n) for n=1..30.

CROSSREFS

Equals A000577(n) - A070765(n). Cf. A001419, A038144.

Sequence in context: A167889 A042651 A225692 * A244746 A110051 A013187

Adjacent sequences:  A070761 A070762 A070763 * A070765 A070766 A070767

KEYWORD

hard,nonn

AUTHOR

Joseph Myers, May 05 2002

EXTENSIONS

More terms from Joseph Myers, Nov 11 2003

a(29) and a(30) from Joseph Myers, Nov 21 2010

STATUS

approved

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Last modified October 31 05:50 EDT 2014. Contains 248845 sequences.