id:A062368 - OEIS Search Results

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Multiplicative with a(p^e) = (e+1)*(e+2)*(4*e+3)/6.

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4

1, 7, 7, 22, 7, 49, 7, 50, 22, 49, 7, 154, 7, 49, 49, 95, 7, 154, 7, 154, 49, 49, 7, 350, 22, 49, 50, 154, 7, 343, 7, 161, 49, 49, 49, 484, 7, 49, 49, 350, 7, 343, 7, 154, 154, 49, 7, 665, 22, 154, 49, 154, 7, 350, 49, 350, 49, 49, 7, 1078, 7, 49, 154, 252, 49, 343, 7, 154 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n) = Sum_{i\|n, j\|n} tau(i)*tau(j)/tau(gcd(i, j)), where tau(n) = number of divisors of n, cf. A000005.` `Also a(n) = Sum_{i\|n, j\|n} tau(LCM(i, j)).`
	CROSSREFS	`Cf. A002412, A060648, A062380.` `Sequence in context: A070847 A053416 A094248 this_sequence A059772 A114369 A027844` `Adjacent sequences: A062365 A062366 A062367 this_sequence A062369 A062370 A062371`
	KEYWORD	`nonn,mult`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)Eunet.yu), Jul 07 2001`

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Last modified August 28 19:25 EDT 2008. Contains 143183 sequences.

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