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A146764 Primes not in A075255 1
13, 61, 73, 109, 151, 181, 229, 241, 257, 293, 307, 313, 349, 353, 373, 397, 409, 487, 509, 557, 571, 577, 601, 613, 643, 653, 661, 709, 727, 733, 739, 751, 761, 773, 811, 823, 937, 941, 977 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

It has been asked whether A146071 contains all primes. The answer is "no": since A075255(n) > n/2-2 for non-prime n, any prime p that did not appear until the rank 2(p+2) is not in A075255. This is a sufficient condition for not being in A146071, but unless proved otherwise, there may be primes in A075255, i.e. not listed here, which nevertheless do not appear in A146071.

PROG

(PARI) A146764( END=999 )={ local( n=1, t=0, k); forprime( p=1, END, while( n<2*(p+2), isprime( k=A075255(n++)) | next; t=bitor(1<<primepi(k), t)); bittest(t, primepi(p)) | print1(p", "))}

CROSSREFS

Cf. A075255, A146071, A145834.

Sequence in context: A163833 A124864 A126400 * A145474 A002647 A118711

Adjacent sequences:  A146761 A146762 A146763 * A146765 A146766 A146767

KEYWORD

easy,nonn

AUTHOR

M. F. Hasler (www.univ-ag.fr/~mhasler), Nov 04 2008

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Last modified February 16 21:30 EST 2012. Contains 205971 sequences.