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A233340 Number of tilings of a 5 X 3n rectangle using 5n trominoes of any shape. 2
1, 62, 8342, 1269900, 198253934, 31111319376, 4887323351972, 767919868804309, 120664440361104580, 18960353496615710993, 2979300461790704311162, 468147088780110777732830, 73561466714064126023807694, 11558951424929920406557632356, 1816295465197137076501207582877 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..400

Alois P. Heinz, G.f. for A233340

Wikipedia, Tromino

FORMULA

G.f.: see link above.

CROSSREFS

Trisection of column k=5 of A233320.

Sequence in context: A056639 A289297 A123806 * A299826 A209905 A227357

Adjacent sequences:  A233337 A233338 A233339 * A233341 A233342 A233343

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Dec 07 2013

STATUS

approved

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Last modified November 14 10:04 EST 2019. Contains 329111 sequences. (Running on oeis4.)