A073926 Powers of 2 rearranged so that every partial sum after 1 is a proper prime power.

1, 8, 16, 2

Offset

1,2

Comments

If a(5) exists -- that is, if there is some k for which 2^k + 27 is a proper prime power -- then k > 100000. Or can it be proved that 2^k + 27 is either prime or has more than one distinct prime factor for all k? - Ryan Propper, Jun 17 2006

Links

Table of n, a(n) for n=1..4.

Crossrefs

Cf. A073923, A073924, A073925.

Sequence in context: A131446 A061746 A028585 * A073925 A053321 A335772

Adjacent sequences: A073923 A073924 A073925 * A073927 A073928 A073929

Keyword

more,nonn

Author

Amarnath Murthy, Aug 19 2002

Status

approved