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A082670 Let p(n) = upper member of n-th pair of twin primes; sequence gives a(n) = p(n)!/2. 0
60, 2520, 3113510400, 60822550204416000, 4111419327088961408862781440000000, 30207631531686917818677566034256998753632256000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..5.

MATHEMATICA

#!/2&/@Select[Partition[Prime[Range[50]], 2, 1], #[[2]]-#[[1]]==2&][[All, 2]] (* Harvey P. Dale, Nov 27 2016 *)

PROG

(PARI) tpperm2(n) = { forprime(x=3, n, if(isprime(x-2), print1((x!/2" ") ) )

CROSSREFS

Sequence in context: A075917 A058929 A057848 * A084659 A230568 A180373

Adjacent sequences:  A082667 A082668 A082669 * A082671 A082672 A082673

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard, May 18 2003

STATUS

approved

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Last modified October 25 01:40 EDT 2021. Contains 348233 sequences. (Running on oeis4.)