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A076448 Numbers one more than a power of 2 which are the sum of n consecutive numbers one more than a power of 2. 0
5, 17, 129, 4097, 2097153, 274877906945, 2361183241434822606849, 87112285931760246646623899502532662132737, 59285549689505892056868344324448208820874232148807968788202283012051522375647233 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..10.

FORMULA

a(n) =2^(2^(n-2)+n-1)+1 = A000051(A005126(n-2)).

EXAMPLE

a(2)=5=2+3, a(3)=17=3+5+9, a(4)=129=5+9+17+33+65.

CROSSREFS

Sequence in context: A256459 A113936 A012263 * A096310 A236530 A249520

Adjacent sequences:  A076445 A076446 A076447 * A076449 A076450 A076451

KEYWORD

nonn

AUTHOR

Henry Bottomley, Nov 07 2002

STATUS

approved

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Last modified January 29 14:07 EST 2020. Contains 331338 sequences. (Running on oeis4.)