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A121837 Least positive j such that Prod_{k=1..n} D(k) + j is prime, where D() are the doublets, A020338. 0
2, 9, 7, 7, 17, 7, 29, 17, 19, 23, 23, 13, 29, 79, 19, 89, 97, 53, 43, 347, 127, 127, 149, 29, 167, 331, 379, 61, 59, 167, 199, 557, 107, 113, 43, 191, 439, 41, 263, 227, 109, 71, 227, 137, 149, 409, 271, 53, 157, 79, 503, 103, 461, 137, 587, 233, 491, 73, 367, 233, 449 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Is every term for n>2 always prime?

LINKS

Table of n, a(n) for n=1..61.

CROSSREFS

Sequence in context: A021340 A241753 A157350 * A160439 A245287 A254595

Adjacent sequences:  A121834 A121835 A121836 * A121838 A121839 A121840

KEYWORD

nonn

AUTHOR

Jason Earls, Aug 28 2006

STATUS

approved

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Last modified February 25 00:39 EST 2018. Contains 299630 sequences. (Running on oeis4.)