

A115231


Primes p which cannot be written in the form 2^i + q^j where i >= 0, j >= 1, q = odd prime.


4



149, 331, 373, 509, 701, 757, 809, 877, 907, 997, 1019, 1087, 1259, 1549, 1597, 1619, 1657, 1759, 1777, 1783, 1867, 1973, 2293, 2377, 2503, 2579, 2683, 2789, 2843, 2879, 2909, 2999, 3119, 3163, 3181, 3187, 3299, 3343, 3433, 3539, 3643, 3697, 3739, 3779
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


COMMENTS

Union with A115232 gives all primes (A000040).
A subsequence of A095842.  M. F. Hasler, Nov 20 2014


LINKS

Table of n, a(n) for n=1..44.


EXAMPLE

A000040(35) = 149 = 2^7+3*7 = 2^6+5*17 = 2^5+3*3*13 =
2^4+7*19 = 2^3+3*47 = 2^2+5*29 = 2^1+3*7*7 = 2^0+2*2*37, therefore 149 is a term (A115230(35)=0).


CROSSREFS

Cf. A115230, A115232, A115233, A000079, A061345.
Sequence in context: A146137 A071331 A095842 * A142359 A185692 A216312
Adjacent sequences: A115228 A115229 A115230 * A115232 A115233 A115234


KEYWORD

nonn


AUTHOR

Reinhard Zumkeller, Jan 17 2006


EXTENSIONS

Recomputed (based on recomputation of A115230) by R. J. Mathar and Reinhard Zumkeller, Apr 29 2010.
Edited by N. J. A. Sloane, Apr 30 2010


STATUS

approved



