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A167142
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Column 0 of the matrix square of triangle A167015.
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4
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1, 2, 5, 23, 171, 1770, 23128, 359326, 6397582, 127481106, 2798191975, 66906139414, 1728471631521, 47946527974230, 1421014299626478, 44813786218342428, 1498598183095006145, 52978138615818746064
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OFFSET
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0,2
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COMMENTS
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This sequence equals the reversal of row 2 of A167015 (when infinitely extended to the left), and then shifted left 1 place.
In triangle T=A167015, row n of T equals the initial n terms in column 0 of matrix power T^n, reversed and with an appended '1'.
The definition of A167015 may be relaxed to allow the triangle to extend indefinitely also to the left, making each row infinite.
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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