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A030432 Primes of form 10n+7. +0
13
7, 17, 37, 47, 67, 97, 107, 127, 137, 157, 167, 197, 227, 257, 277, 307, 317, 337, 347, 367, 397, 457, 467, 487, 547, 557, 577, 587, 607, 617, 647, 677, 727, 757, 787, 797, 827, 857, 877, 887, 907, 937, 947, 967, 977, 997, 1087, 1097, 1117, 1187, 1217, 1237 (list; graph; listen)
OFFSET

1,1

LINKS

A. Granville and G. Martin, Prime number races

FORMULA

a(n) = 10*A102342(n) + 7.

Union of A132231 and A039949. [From Ray Chandler (rayjchandler(AT)sbcglobal.net), Apr 07 2009]

MATHEMATICA

Select[Prime@Range[210], Mod[ #, 10] == 7 &] (*Chandler*)

CROSSREFS

Cf. A045357, A045380, A049509, A102342.

Sequence in context: A062675 A106095 A153319 this_sequence A090147 A155007 A140121

Adjacent sequences: A030429 A030430 A030431 this_sequence A030433 A030434 A030435

KEYWORD

nonn

AUTHOR

Warut Roonguthai (warut822(AT)yahoo.com)

EXTENSIONS

Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 07 2006

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.


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