A172340 - OEIS

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A172340

a(n)=((2^n+1)^n-(2^n-1)^n)/2

0

1, 8, 193, 16448, 5253121, 6447694208, 30795721162753, 576522325894105088, 42502811563960266915841, 12379542064132015743721023488, 14278867426031486089248841370959873

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..11.

MATHEMATICA

Table[((2^x + 1)^x - (2^x - 1)^x)/2, {x, 1, 15}]

CROSSREFS

Sequence in context: A003956 A204820 A041269 * A103500 A232911 A338806

Adjacent sequences: A172337 A172338 A172339 * A172341 A172342 A172343

KEYWORD

nonn

AUTHOR

Artur Jasinski, Feb 01 2010

STATUS

approved