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A103472 Number of polyominoes without holes consisting of 6 regular unit n-gons. 10
12, 35, 118, 82, 118, 269, 585, 985, 1750, 1438, 1765, 2718, 4336, 6040, 8814, 7678, 8839, 11876, 16410, 20970, 27720, 24998, 27787, 34763, 44687, 54133, 67601, 62252, 67777, 81066, 99420, 116465, 140075, 130711, 140434, 163027, 193587, 221521 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..40.

S. Kurz, k-polyominoes.

EXAMPLE

a(3)=12 because there are 12 polyiamonds consisting of 6 triangles and a(4)=35 because there are 35 polyominoes consisting of 6 squares.

CROSSREFS

Cf. A103469, A103470, A103471, A103473.

Sequence in context: A195858 A121805 A195542 * A009649 A195539 A007794

Adjacent sequences:  A103469 A103470 A103471 * A103473 A103474 A103475

KEYWORD

nonn

AUTHOR

Sascha Kurz, Feb 07 2005

STATUS

approved

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Last modified July 21 12:43 EDT 2017. Contains 289642 sequences.