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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; text; 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 nonprime 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. LINKS 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<

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Last modified May 10 14:44 EDT 2021. Contains 343773 sequences. (Running on oeis4.)