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A098778 Least k such that (k*P(n)#)^2 + 1 is prime with P(i)#=i-th primorial. 0
1, 1, 3, 1, 1, 12, 7, 1, 13, 13, 7, 10, 13, 6, 4, 1, 6, 46, 12, 27, 15, 40, 31, 14, 17, 9, 26, 9, 7, 5, 23, 27, 26, 2, 5, 9, 5, 24, 17, 23, 26, 166, 110, 2, 24, 87, 6, 113, 116, 3, 140, 12, 93, 26, 2, 15, 63, 15, 2, 143, 19, 19, 27, 122, 26, 28, 206, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..68.

CROSSREFS

Sequence in context: A067402 A113340 A134523 * A078122 A128592 A156584

Adjacent sequences:  A098775 A098776 A098777 * A098779 A098780 A098781

KEYWORD

nonn

AUTHOR

Pierre CAMI, Oct 04 2004

STATUS

approved

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Last modified April 12 18:58 EDT 2021. Contains 342932 sequences. (Running on oeis4.)