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A167143 Column 0 of the matrix cube of triangle A167015. 3
1, 3, 9, 43, 312, 3121, 39616, 602135, 10547538, 207620746, 4514623895, 107150379369, 2751648614456, 75953000041971, 2241736112814551, 70446370941793711, 2348550874184397643, 82802885494751780415 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

This sequence equals the reversal of row 3 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.

LINKS

Table of n, a(n) for n=0..17.

CROSSREFS

Cf. A167015, other rows: A167016, A167142, A167144, A167145.

Sequence in context: A199140 A154606 A232216 * A136732 A108239 A218921

Adjacent sequences:  A167140 A167141 A167142 * A167144 A167145 A167146

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Oct 28 2009

STATUS

approved

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Last modified September 25 15:27 EDT 2021. Contains 347658 sequences. (Running on oeis4.)