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A125164 Positive integers n such that no prime exists of the form (k! + 3n - 1), (k! + 3n) or (k! + 3n + 1) for any k. 5
11, 21, 25, 31, 39, 41, 47, 51, 53, 61, 67, 69, 71, 73, 81, 91, 95, 99, 101, 107, 109, 111, 113, 121, 123, 125, 131, 135, 137, 141, 145, 151, 157, 161, 165, 171, 175, 177, 179, 181, 183, 191, 193, 201, 203, 207, 209, 211, 221, 223, 229, 231, 235, 237, 241, 243, 245, 249, 251, 255, 259 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

3*a(n) is an index of the middle term in a triple of consecutive zeros in A125162. The indices of zeros in A125162 are listed in A125163.

Primes in this sequence form A115058.

LINKS

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

EXAMPLE

Triplets of consecutive terms in A125163: {32,33,34}, {62,63,64}, {74,75,76}, {92,93,94), {116,117,118}, {122,123,124}, {140,141,142}, {152,153,154}, {158,159,160}, {182,183,184}, {200,201,202}, {206,207,208}, {212,213,214}, {218,219,220}, {242,243,244}, {272,273,274}, {284,285,286}.

CROSSREFS

Cf. A125162, A125163, A115058.

Sequence in context: A189226 A261409 A195100 * A101223 A109686 A077522

Adjacent sequences:  A125161 A125162 A125163 * A125165 A125166 A125167

KEYWORD

nonn

AUTHOR

Alexander Adamchuk, Nov 22 2006

EXTENSIONS

Edited and extended by Max Alekseyev, Feb 06 2010

STATUS

approved

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Last modified February 17 12:10 EST 2020. Contains 331996 sequences. (Running on oeis4.)