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A088988
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Least prime that begins a run of exactly 2n-1 primes between two consecutive prime-index-primes.
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0
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7, 19, 89, 463, 809, 1223, 619, 15727, 3767, 6907, 9109, 14197, 22109, 27103, 41057, 55009, 10937, 99559, 357829, 216649, 177797, 172213, 1040813, 327779, 375043, 219937, 423019, 1049177, 536281, 523571, 402769, 1155431, 2192123, 1792103
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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FORMULA
| a(n) = prime(1 + A000230(n)) = prime(1 + prime(A038664(n))).
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EXAMPLE
| 5 and 11 are the 3rd and 5th primes; 7 begins a run of 1 primes.
17 and 31 are the 7rd and 11th primes; 19 begins a run of 3 primes.
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PROG
| (PARI) pipprimes(n, m) = { for(x=1, n, c=0; p1 = prime(prime(x)); p2 = prime(prime(x+1)); forprime(y=p1+2, p2-2, c++); if(c==m, forprime(y=p1+2, p2-2, print1(y", "); ); ) ) }
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CROSSREFS
| Sequence in context: A144723 A062551 A155390 * A109879 A109880 A084603
Adjacent sequences: A088985 A088986 A088987 * A088989 A088990 A088991
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KEYWORD
| nonn
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AUTHOR
| Cino Hilliard (hillcino368(AT)gmail.com), Oct 31 2003
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EXTENSIONS
| Extended and edited by T. D. Noe (noe(AT)sspectra.com), Apr 14 2009
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