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A097491 Primes which are two greater than A048599 terms. 2
5, 17, 21800053277, 72409291238312731227527, 86984485062381462583582279727, 21679097826151232817152558557032490897727272048343000297777, 107025222275017133994159705286756083545279583250537082122450588876727 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..7.

PROG

(PARI) ft(n) = p=1; for(x=1, n, p*=twinl(x); if(isprime(p+2), print1(p+2", ")); p*=twinu(x); if(isprime(p+2), print1(p+2", "))) \The n-th lower twin prime twinl(n) = { local(c, x); c=0; x=1; while(c<n, if(isprime(prime(x)+2), c++); x++; ); return(prime(x-1)) } \The n-th upper twin prime twinu(n) = { local(c, x); c=0; x=1; while(c<n, if(isprime(prime(x)+2), c++); x++; ); return(prime(x)) }

CROSSREFS

Cf. A048599, A097490, A097493.

Sequence in context: A085832 A062223 A116911 * A120087 A180135 A260080

Adjacent sequences:  A097488 A097489 A097490 * A097492 A097493 A097494

KEYWORD

nonn

AUTHOR

Cino Hilliard, Aug 24 2004

EXTENSIONS

Edited by Don Reble, Apr 16 2007

STATUS

approved

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Last modified August 26 05:49 EDT 2019. Contains 326330 sequences. (Running on oeis4.)