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A135837
A007318
* a triangle with (1, 2, 2, 4, 4, 8, 8,...) in the main diagonal and the rest zeros.
+0
3
1, 1, 2, 1, 4, 2, 1, 6, 6, 4, 1, 8, 12, 16, 4, 1, 10, 20, 40, 20, 8, 1, 12, 30, 80, 60, 48, 8, 1, 14, 42, 140, 140, 168, 56, 16, 1, 16, 56, 224, 280, 448, 224, 128, 16, 1, 18, 72, 336, 504, 1008, 672, 576, 144, 32
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Maintained by
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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.
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