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A167144 Column 0 of the matrix 4th power of triangle A167015. 4
1, 4, 14, 70, 503, 4898, 60517, 899764, 15496561, 301137820, 6483583802, 152689979223, 3896718655702, 107010852239903, 3144913162405021, 98469727935174977, 3272516761148911378, 115063890523670839944 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

This sequence equals the reversal of row 4 of A167015 (when extended infinitely 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, A167016, A167142, A167143, A167145.

Sequence in context: A222980 A321273 A322700 * A159483 A088127 A242739

Adjacent sequences:  A167141 A167142 A167143 * A167145 A167146 A167147

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Oct 28 2009

STATUS

approved

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Last modified January 24 13:24 EST 2020. Contains 331193 sequences. (Running on oeis4.)