A003973 - OEIS

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A003973

Inverse Moebius transform of A003961.

1, 4, 6, 13, 8, 24, 12, 40, 31, 32, 14, 78, 18, 48, 48, 121, 20, 124, 24, 104, 72, 56, 30, 240, 57, 72, 156, 156, 32, 192, 38, 364, 84, 80, 96, 403, 42, 96, 108, 320, 44, 288, 48, 182, 248, 120, 54, 726, 133, 228, 120, 234, 60, 624, 112, 480, 144, 128, 62, 624, 68 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`Multiplicative with a(p^e) = (q^(e+1)-1)/(q-1) where q = nextPrime(p).. - David W. Wilson, Sep 01, 2001`
	CROSSREFS	`Sequence in context: A061072 A130435 A028444 * A034747 A168015 A191199` `Adjacent sequences: A003970 A003971 A003972 * A003974 A003975 A003976`
	KEYWORD	`nonn,easy,mult`
	AUTHOR	`Marc LeBrun (mlb(AT)well.com)`
	EXTENSIONS	`More terms from David W. Wilson (davidwwilson(AT)comcast.net), Aug 29 2001`

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Last modified February 13 08:12 EST 2012. Contains 205451 sequences.