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A126788 Least prime q such that q*p(n)# -1 and q*p(n)# +1 are twin primes where p(i)#=i-th primorial. 0
2, 2, 2, 2, 5, 11, 17, 11, 11, 37, 51, 23, 127, 53, 37, 1427, 23, 11, 491, 11, 1429, 139, 83, 547, 233, 881, 149, 47, 313, 2, 463, 857, 1367, 2269, 2221, 8171, 317, 619, 3727, 227, 173, 2251, 1091, 13, 439, 277, 1597, 433, 173, 1303, 2927, 1367, 6679, 4903, 1979 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

Milan Janjic, Enumerative Formulas for Some Functions on Finite Sets

EXAMPLE

2*(2*3*5*7) -1 = 419

2*(2*3*5*7) +1 = 421

419 and 421 twin primes, 2*3*5*7 = p(4)# so q(4)=2

CROSSREFS

Sequence in context: A141299 A035681 A195601 * A098789 A162489 A079894

Adjacent sequences:  A126785 A126786 A126787 * A126789 A126790 A126791

KEYWORD

nonn

AUTHOR

Pierre CAMI (pierre-cami(AT)bbox.fr), Feb 19 2007

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Last modified February 14 14:07 EST 2012. Contains 205623 sequences.