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A247742 Total number of V shapes in all tilings of a 5 X n rectangle with pentominoes of any shape. 2
0, 0, 0, 20, 192, 1568, 12636, 114216, 1022604, 8640980, 72406668, 605996308, 5065065936, 42045917448, 346705312932, 2848191025876, 23325323646860, 190440300054560, 1550193295412264, 12585187313440032, 101937894879304356, 823951520087842720, 6646993031822674592 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

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

Wikipedia, Pentomino

FORMULA

a(n) = Sum_{k>0} k * A247709(n,k).

CROSSREFS

Cf. A174249, A233427, A247709.

Sequence in context: A125383 A126541 A213218 * A355590 A219369 A245137

Adjacent sequences: A247739 A247740 A247741 * A247743 A247744 A247745

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Sep 23 2014

STATUS

approved

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Last modified March 25 23:06 EDT 2023. Contains 361529 sequences. (Running on oeis4.)