id:A137727 - OEIS Search Results

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Final digit of prime(n)*prime(n+1).

+0
2

6, 5, 5, 7, 3, 1, 3, 7, 7, 9, 7, 7, 3, 1, 1, 7, 9, 7, 7, 3, 7, 7, 7, 3, 7, 3, 1, 3, 7, 1, 7, 7, 3, 1, 9, 7, 1, 1, 1, 7, 9, 1, 3, 1, 3, 9, 3, 1, 3, 7, 7, 9, 1, 7, 1, 7, 9, 7, 7, 3, 9, 1, 7, 3, 1, 7, 7, 9, 3, 7, 7, 3, 1, 7, 7, 7, 3, 7, 9, 1, 9, 1, 3, 7, 7, 7, 3, 7, 3, 1, 3, 3, 7, 9, 7, 7, 9, 3, 3, 7, 9, 1, 7, 9, 7 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) = Mod[ Prime[n]*Prime[n+1], 10 ]`
	MATHEMATICA	`Table[ Mod[ Prime[n]*Prime[n+1], 10 ], {n, 1, 1000} ]`
	CROSSREFS	`Cf. A007652 = Final digit of prime(n). Cf. A110923 = Final two digits of prime(n) (with leading zero omitted). Cf. A137728 = Second digit from the end of product of first n primes.` `Sequence in context: A050815 A021608 A108088 this_sequence A010497 A070860 A019850` `Adjacent sequences: A137724 A137725 A137726 this_sequence A137728 A137729 A137730`
	KEYWORD	`nonn,base`
	AUTHOR	`Alexander Adamchuk (alex(AT)kolmogorov.com), Feb 08 2008`

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Last modified July 23 10:48 EDT 2008. Contains 142285 sequences.

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