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A120902 Row sums of triangle A120898 (cascadence of 1+2x+x^2). 4
1, 5, 23, 103, 450, 1932, 8196, 34468, 143997, 598463, 2476936, 10216818, 42023225, 172436363, 706132290, 2886574198, 11781962631, 48025519977, 195530083266, 795241236228, 3231290822280, 13118557603984, 53218706064038 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..22.

CROSSREFS

Cf. A120898, A120899, A120900, A120901.

Sequence in context: A113443 A124999 A258431 * A054441 A289803 A102285

Adjacent sequences:  A120899 A120900 A120901 * A120903 A120904 A120905

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Jul 14 2006

STATUS

approved

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Last modified July 25 03:31 EDT 2021. Contains 346282 sequences. (Running on oeis4.)