A083786 - OEIS

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A083786

Composite numbers mod 10.

4, 6, 8, 9, 0, 2, 4, 5, 6, 8, 0, 1, 2, 4, 5, 6, 7, 8, 0, 2, 3, 4, 5, 6, 8, 9, 0, 2, 4, 5, 6, 8, 9, 0, 1, 2, 4, 5, 6, 7, 8, 0, 2, 3, 4, 5, 6, 8, 9, 0, 2, 4, 5, 6, 7, 8, 0, 1, 2, 4, 5, 6, 7, 8, 0, 1, 2, 3, 4, 5, 6, 8, 9, 0, 2, 4, 5, 6, 8, 0, 1, 2, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 8, 9, 0, 2, 3, 4, 5, 6, 8, 0 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`G. C. Greubel, Table of n, a(n) for n = 1..5000`
	FORMULA	`a(n) = A002808(n) mod 10. - Ray Chandler, Sep 04 2003`
	MATHEMATICA	`Mod[Rest@ Select[Range@140, !PrimeQ@# &], 10] (* Robert G. Wilson v, Mar 17 2006 *)`
	PROG	`(PARI) lista(nn) = forcomposite(n=2, nn, print1(n % 10, ", ")); \\ Michel Marcus, Oct 30 2017`
	CROSSREFS	`Cf. A002808, A007652.` `Sequence in context: A023991 A183005 A103189 * A199976 A165957 A338028` `Adjacent sequences: A083783 A083784 A083785 * A083787 A083788 A083789`
	KEYWORD	`nonn,easy`
	AUTHOR	`Roger L. Bagula, Aug 21 2003`
	EXTENSIONS	`More terms from Ray Chandler, Sep 04 2003` `Entries checked by Robert G. Wilson v, Mar 17 2006`
	STATUS	`approved`

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Last modified March 30 09:39 EDT 2023. Contains 361609 sequences. (Running on oeis4.)