A093162 - OEIS

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A093162

Primes of the form 20*R_n + 3, where R_n is the repunit (A002275) of length n.

3, 23, 223, 22222223, 22222222223, 222222222222222222222222222222222223 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	LINKS	`Makato Kamada, Prime numbers of the form 222..23`
	CROSSREFS	`Cf. A056656 (corresponding n, and count of digits 2 in a(n)).` `Sequence in context: A068691 A093135 A202997 * A206763 A201205 A068954` `Adjacent sequences: A093159 A093160 A093161 * A093163 A093164 A093165`
	KEYWORD	`nonn`
	AUTHOR	`Rick L. Shepherd (rshepherd2(AT)hotmail.com), Mar 26 2004`

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Last modified February 15 05:26 EST 2012. Contains 205694 sequences.