id:A117819 - OEIS Search Results

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Final digit d of n is in the sequence iff d is prime or n is prime.

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2, 3, 5, 7, 1, 2, 3, 5, 7, 9, 2, 3, 5, 7, 9, 1, 2, 3, 5, 7, 1, 2, 3, 5, 7, 2, 3, 5, 7, 9, 1, 2, 3, 5, 7, 1, 2, 3, 5, 7, 9, 2, 3, 5, 7, 9, 2, 3, 5, 7, 1, 2, 3, 5, 7, 9, 2, 3, 5, 7, 2, 3, 5, 7, 1, 2, 3, 5, 7, 9, 2, 3, 5, 7, 9, 1, 2, 3, 5, 7, 2, 3, 5, 7, 2, 3, 5, 7, 9, 1, 2, 3, 5, 7, 1, 2, 3, 5, 7, 9, 2, 3, 5, 7, 1 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`Calculations:` `n: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ...` `d: - 2 3 - 5 - 7 - - -- -1 -2 -3 -- -5 -- -7 -- -9 -- ...`
	PROGRAM	`(PARI) for(n=1, 211, if(isprime(d=n%10)\|\|isprime(n), print1(d, ", ")))`
	CROSSREFS	`Cf. A118385.` `Sequence in context: A033308 A134690 A065859 this_sequence A074461 A073342 A074462` `Adjacent sequences: A117816 A117817 A117818 this_sequence A117820 A117821 A117822`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Apr 30 2006`
	EXTENSIONS	`Edited, corrected and extended by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), May 02 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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