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A097441 Least k such that k*P(n)#/2 - 4 and k*P(n)#/2 + 2 are consecutive primes P(i)= i-th prime, P(i)# = i-th primorial. +0
1
27, 9, 9, 9, 7, 27, 7, 9, 19, 9, 21, 1, 267, 47, 1, 69, 307, 19, 585, 37, 147, 313, 159, 251, 99, 73, 355, 197, 225, 545, 99, 5, 481, 2359, 337, 285, 95, 993, 903, 279, 779, 123, 519, 1201, 1717, 1551, 261, 123, 1649, 1571, 87, 1325, 537, 201, 2131, 1403, 205, 863 (list; graph; listen)
OFFSET

1,1

EXAMPLE

27*2/2 = 27, 23 and 29 consecutive primes so for n=1 k=27

9*2*3/2 = 27 so for n=2 k=9

CROSSREFS

Adjacent sequences: A097438 A097439 A097440 this_sequence A097442 A097443 A097444

Sequence in context: A040709 A040710 A040708 this_sequence A040707 A040706 A069893

KEYWORD

nonn

AUTHOR

Pierre CAMI (pierrecami(AT)tele2.fr), Aug 22 2004

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Last modified November 8 07:45 EST 2009. Contains 166143 sequences.


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