A120902 Row sums of triangle A120898 (cascadence of 1+2x+x^2).

1, 5, 23, 103, 450, 1932, 8196, 34468, 143997, 598463, 2476936, 10216818, 42023225, 172436363, 706132290, 2886574198, 11781962631, 48025519977, 195530083266, 795241236228, 3231290822280, 13118557603984, 53218706064038

Offset

0,2

Links

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

Crossrefs

Cf. A120898, A120899, A120900, A120901.

Sequence in context: A124999 A258431 A356340 * A054441 A289803 A102285

Adjacent sequences: A120899 A120900 A120901 * A120903 A120904 A120905

Keyword

nonn

Author

Paul D. Hanna, Jul 14 2006

Status

approved