A247742 Total number of V shapes in all tilings of a 5 X n rectangle with pentominoes of any shape.

0, 0, 0, 20, 192, 1568, 12636, 114216, 1022604, 8640980, 72406668, 605996308, 5065065936, 42045917448, 346705312932, 2848191025876, 23325323646860, 190440300054560, 1550193295412264, 12585187313440032, 101937894879304356, 823951520087842720, 6646993031822674592

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