A247737 - OEIS

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A247737

Total number of L shapes in all tilings of a 5 X n rectangle with pentominoes of any shape.

2

0, 0, 4, 24, 436, 3888, 29880, 264460, 2353136, 20400352, 171215320, 1430108512, 11962161392, 99523393628, 822501750184, 6763177931936, 55433124540308, 453013557727460, 3690931980743340, 29988435689294280, 243064471330287696, 1965884816120576180

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..500

Wikipedia, Pentomino

FORMULA

a(n) = Sum_{k>0} k * A247704(n,k).

CROSSREFS

Cf. A174249, A233427, A247704.

Sequence in context: A024250 A167140 A010572 * A326871 A012945 A296398

Adjacent sequences: A247734 A247735 A247736 * A247738 A247739 A247740

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Sep 23 2014

STATUS

approved