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A132479 Row sums of triangle A132478. 2
1, 5, 16, 32, 64, 128, 256, 512, 1024, 2048 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..9.

Index entries for linear recurrences with constant coefficients, signature (2).

FORMULA

a(0) = 1, a(2) = 5, a(n) = 2^(n+2) for n>1.

G.f.: -(1+3*x+6*x^2)/(-1+2*x). - R. J. Mathar, Nov 14 2007

EXAMPLE

a(3) = 32 = sum of row 3 terms of triangle A132478: (4 + 9 + 18 + 1).

a(3) = 32 = 2^5.

CROSSREFS

Cf. A132478.

Sequence in context: A222535 A063076 A270805 * A045944 A038361 A227719

Adjacent sequences:  A132476 A132477 A132478 * A132480 A132481 A132482

KEYWORD

nonn

AUTHOR

Gary W. Adamson, Aug 23 2007

STATUS

approved

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Last modified June 19 13:38 EDT 2021. Contains 345138 sequences. (Running on oeis4.)