id:A061258 - OEIS Search Results

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a(n)=Sum_{d|n} d*psi(d), where psi(d) is reduced totient function, cf. A002322.

+0
4

1, 3, 7, 11, 21, 21, 43, 27, 61, 63, 111, 53, 157, 129, 87, 91, 273, 183, 343, 151, 175, 333, 507, 117, 521, 471, 547, 305, 813, 261, 931, 347, 447, 819, 483, 431, 1333, 1029, 631, 327, 1641, 525, 1807, 781, 681, 1521, 2163, 373, 2101, 1563, 1095, 1103, 2757 (list; graph; listen)

	OFFSET	`1,2`
	CROSSREFS	`Cf. A002322, A057660, A001001, A060640, A061259.` `Sequence in context: A083908 A050577 A095352 this_sequence A057660 A130972 A151923` `Adjacent sequences: A061255 A061256 A061257 this_sequence A061259 A061260 A061261`
	KEYWORD	`easy,nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 21 2001`

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Last modified November 21 21:21 EST 2009. Contains 167310 sequences.

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