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A268371 Triangle read by rows: T(n,k) is the number of free polyominoes with width n and height k. 2
1, 1, 2, 1, 6, 24, 1, 12, 181, 1051, 1, 30, 941, 21992, 238048 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Superset of Craig Knecht's A268311.

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

The first rows of the array are:

1;

1, 2;

1, 6, 24;

1, 12, 181, 1051;

...

CROSSREFS

Cf. A268311, A000105 (free polyominoes).

Sequence in context: A025271 A153804 A239740 * A318918 A100404 A320570

Adjacent sequences:  A268368 A268369 A268370 * A268372 A268373 A268374

KEYWORD

nonn,tabl,more

AUTHOR

John Mason, Feb 03 2016

STATUS

approved

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Last modified November 17 13:33 EST 2019. Contains 329230 sequences. (Running on oeis4.)