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A291745 Nonprimes of the form 3*k + 1. 4
1, 4, 10, 16, 22, 25, 28, 34, 40, 46, 49, 52, 55, 58, 64, 70, 76, 82, 85, 88, 91, 94, 100, 106, 112, 115, 118, 121, 124, 130, 133, 136, 142, 145, 148, 154, 160, 166, 169, 172, 175, 178, 184, 187, 190, 196, 202, 205, 208, 214, 217, 220, 226, 232, 235, 238, 244, 247 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Subsequence of A018252. A091300 is a subsequence.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1600

MATHEMATICA

DeleteCases[3 Range[0, 300] + 1, _?PrimeQ]

PROG

(Magma) [n: n in [1..400 by 3] | not IsPrime(n)];

CROSSREFS

Cf. A002476, A016777, A091113, A091300, A291746, A291747.

Sequence in context: A277570 A310515 A310516 * A176262 A310517 A310518

Adjacent sequences:  A291742 A291743 A291744 * A291746 A291747 A291748

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Aug 31 2017

STATUS

approved

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Last modified October 1 14:19 EDT 2022. Contains 357149 sequences. (Running on oeis4.)