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A166456 Row sums of triangle A166455 2
1, 2, 6, 12, 30, 60, 124, 248, 510, 1020, 2044, 4088, 8188, 16376, 32760, 65520, 131070, 262140, 524284, 1048568, 2097148, 4194296, 8388600, 16777200, 33554428, 67108856, 134217720, 268435440, 536870904, 1073741808, 2147483632 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..30.

FORMULA

a(n)=2^(n+1)-A001316(n). [From R. J. Mathar, Oct 30 2009]

EXAMPLE

a(3) = 12 = (1 + 5 + 5 + 1)

PROG

Contribution from R. J. Mathar, Oct 30 2009: (Start)

(Python) def A000120(n):

...a=0

...while n > 0:

......a += n % 2

......n //= 2

...return a

def A001316(n):

...return 2**A000120(n)

def A166456(n):

...return 2**(n+1)-A001316(n)

print([A166456(n) for n in range(0, 80)])

(End)

CROSSREFS

A166455

Sequence in context: A080742 A005417 A058215 * A162214 A100071 A129912

Adjacent sequences:  A166453 A166454 A166455 * A166457 A166458 A166459

KEYWORD

nonn

AUTHOR

Gary W. Adamson, Oct 14 2009

EXTENSIONS

Extended by R. J. Mathar, Oct 30 2009

STATUS

approved

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Last modified July 24 04:08 EDT 2019. Contains 325290 sequences. (Running on oeis4.)