id:A122037 - OEIS Search Results

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A122037

Largest prime factor of number equal to the arithmetic mean of four successive primes.

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3, 3, 5, 3, 11, 5, 19, 7, 23, 11, 5, 17, 3, 29, 17, 7, 3, 19, 5, 127, 139, 3, 149, 31, 11, 7, 181, 31, 13, 5, 43, 19, 29, 241, 19, 23, 13, 53, 5, 139, 97, 17, 13, 53, 37, 31, 11, 17, 11, 127, 43, 19, 7, 71, 431, 7, 149, 11, 79, 37, 163, 11, 127, 257, 41, 271, 23, 43, 113, 19, 3 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) = A006530(A102655(n)).`
	MATHEMATICA	`FactorInteger[ # ][[ -1, 1]] & /@ Select[Table[Sum[Prime[k], {k, n, n + 3}]/4, {n, 120}], IntegerQ] (Chandler)`
	CROSSREFS	`Cf. A006530, A102655.` `Sequence in context: A048691 A071053 A094439 this_sequence A008316 A072820 A131950` `Adjacent sequences: A122034 A122035 A122036 this_sequence A122038 A122039 A122040`
	KEYWORD	`nonn`
	AUTHOR	`Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Sep 14 2006`
	EXTENSIONS	`Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Sep 25 2006`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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