id:A072460 - OEIS Search Results

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Smallest even nontotient number of which the largest prime divisor equals n-th prime.

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50, 14, 154, 26, 34, 38, 230, 174, 62, 74, 246, 86, 94, 318, 118, 122, 134, 142, 146, 158, 830, 534, 194, 202, 206, 214, 218, 678, 254, 1310, 274, 278, 298, 302, 314, 326, 334, 1730, 1074, 362, 1146, 386, 394, 398, 422, 446, 454, 458, 2330, 1434, 482, 1506 (list; graph; listen)

	OFFSET	`3,1`
	FORMULA	`a(n)=Min{x; A006530[A005277(x)=p[n]=A000040(n), n>2}`
	EXAMPLE	`First even nontotient of which largest prime-factor is p(31)=127, equals 254=A005277[41], the 41-st, a(31)=254; 2 and 3 are never largest prime factors of even nontotient numbers.`
	CROSSREFS	`Cf. A006530, A005277.` `Sequence in context: A022078 A036172 A048178 this_sequence A033370 A090691 A033980` `Adjacent sequences: A072457 A072458 A072459 this_sequence A072461 A072462 A072463`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Jun 19 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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