A247746

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

0, 0, 0, 4, 52, 532, 4772, 44624, 413332, 3704668, 32312456, 277318708, 2365831332, 20023322874, 168065885292, 1401084600204, 11617827516556, 95910742322858, 788559509624036, 6459527069162538, 52742304806108492, 429408151732020490, 3487057360672870112

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