A133914 - OEIS

A133914

Row sums of triangle A133913.

1, 3, 5, 11, 23, 44, 89, 177, 355, 711, 1420, 2841, 5683, 11367, 22731, 45463, 90925, 181851, 363703, 727404, 1454809, 2909617, 5819235, 11638471, 23276940, 46553881, 93107763, 186215527, 372431051, 744862103, 1489724205, 2979448411, 5958896823, 11917793644

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..34.

FORMULA

a(n) = 2 * a(n-1) + A133912(n). - Jack W Grahl, Oct 11 2022

EXAMPLE

a(4) = 11 = sum of row 4 terms of triangle A133913: (1 + 4 + 4 + 2).

a(4) = 11 = 2*a(3) + A133912(4) = 2*5 + 1, where A133912 = (1, 1, -1, 1, 1, -2, 1, -1, ...), first finite difference row of A007001.

CROSSREFS

Cf. A007001, A133912, A133913.