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Column 0 of the matrix square of triangle A167015.
4

%I #2 Mar 30 2012 18:37:20

%S 1,2,5,23,171,1770,23128,359326,6397582,127481106,2798191975,

%T 66906139414,1728471631521,47946527974230,1421014299626478,

%U 44813786218342428,1498598183095006145,52978138615818746064

%N Column 0 of the matrix square of triangle A167015.

%C This sequence equals the reversal of row 2 of A167015 (when infinitely extended to the left), and then shifted left 1 place.

%C 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'.

%C The definition of A167015 may be relaxed to allow the triangle to extend indefinitely also to the left, making each row infinite.

%Y Cf. A167015, rows: A167016, A167143, A167144, A167145.

%K nonn

%O 0,2

%A _Paul D. Hanna_, Oct 28 2009