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 A115232 Primes p which can be written in the form 2^i + q^j where i >= 0, j >= 1, q = odd prime. 2
 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n)=A000040(n+2) for n <= 32, but A000040(35)=149 is a term of A115231; A115233 is a subsequence; the union with A115231 gives all primes (A000040); A006512 and A053703 are subsequences. LINKS MATHEMATICA maxp = 281; Union[Sort[Reap[Do[p = 2^i + q^j; If[p <= maxp && PrimeQ[p], Sow[p]], {i, 0, Log[2, maxp]//Ceiling}, {j, 1, Log[3, maxp]//Ceiling}, {q, Prime[Range[2, PrimePi[maxp]]]}]][[2, 1]]]] (* Jean-François Alcover, Aug 03 2018 *) CROSSREFS Cf. A000079, A061345. Cf. A006512, A053703, A115231, A115233. Sequence in context: A215848 A175212 A240710 * A332346 A020626 A136207 Adjacent sequences: A115229 A115230 A115231 * A115233 A115234 A115235 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 Terms a(1)=2 and a(2)=3 removed from Data by Jean-François Alcover, Aug 03 2018 STATUS approved

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Last modified December 9 17:12 EST 2022. Contains 358702 sequences. (Running on oeis4.)