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A139241 Second differences of Mersenne numbers A001348. 3
20, 72, 1824, 4224, 116736, 270336, 7471104, 520617984 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..8.

CROSSREFS

Cf. A001348, A139230, A139232, A139236, A139238, A139242, A139243.

Sequence in context: A240820 A143854 A263969 * A139232 A002292 A225923

Adjacent sequences:  A139238 A139239 A139240 * A139242 A139243 A139244

KEYWORD

easy,nonn

AUTHOR

Omar E. Pol, Apr 19 2008

STATUS

approved

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Last modified December 7 07:15 EST 2016. Contains 278841 sequences.