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A159262 Largest prime appearing as an exponent in the sum in A159261. 1
2, 3, 7, 11, 19, 191, 709, 1597, 16421 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..9.

MATHEMATICA

s=1; Reap[Do[s=s+2^Prime[n]; If[PrimeQ[s], Sow[Prime[n]]], {n, 2000}]][[2, 1]]

CROSSREFS

Sequence in context: A180422 A055502 A003173 * A160434 A139630 A245738

Adjacent sequences:  A159259 A159260 A159261 * A159263 A159264 A159265

KEYWORD

nonn

AUTHOR

T. D. Noe, Apr 07 2009

STATUS

approved

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Last modified April 21 10:45 EDT 2021. Contains 343150 sequences. (Running on oeis4.)