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A158955 First differences of A061241. 1
36, 18, 18, 18, 54, 72, 18, 36, 36, 18, 18, 18, 54, 18, 18, 90, 54, 18, 54, 18, 18, 18, 126, 54, 90, 36, 18, 18, 18, 36, 90, 18, 18, 54, 18, 108, 18, 36, 126, 18, 36, 36, 54, 36, 72, 18, 54, 18, 36, 126, 18, 72, 18, 18, 54, 18, 36, 36, 54, 36, 144, 54, 18, 18, 90, 36, 18, 36, 162, 18 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Six prime modulo classes are A061237, A061238, A061239, A061240, A061241 and A061242

with remainders 1, 2, 4, 5, 7, and 8 (mod 9).

LINKS

Table of n, a(n) for n=1..70.

MATHEMATICA

Differences[Select[Prime[Range[500]], Mod[#, 9]==7&]] (* Harvey P. Dale, Oct 13 2022 *)

CROSSREFS

Cf. A158910.

Sequence in context: A008894 A033973 A033356 * A065784 A081726 A196044

Adjacent sequences:  A158952 A158953 A158954 * A158956 A158957 A158958

KEYWORD

nonn,less

AUTHOR

Paul Curtz, Apr 01 2009

EXTENSIONS

Edited and extended by R. J. Mathar, Apr 04 2009

STATUS

approved

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Last modified November 26 03:33 EST 2022. Contains 358353 sequences. (Running on oeis4.)