id:A152985 - OEIS Search Results

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Sum of proper divisors minus the number of proper divisors of the square A000290(n).

+0
1

0, 1, 2, 11, 4, 47, 6, 57, 36, 109, 10, 245, 12, 195, 170, 247, 16, 509, 18, 547, 292, 439, 22, 1055, 152, 597, 358, 969, 28, 1895, 30, 1013, 632, 985, 534, 2431, 36, 1215, 850, 2317, 40, 3397, 42, 2173, 1712, 1747, 46, 4313, 396, 2953, 1382, 2955, 52, 4715, 1090, 4083 (list; graph; listen)

	OFFSET	`1,3`
	LINKS	`B. D. Swan, Table of n, a(n) for n=1,...,50000`
	FORMULA	`a(n) = A001065(A000290(n))-A032741(A000290(n)) = A152770(A000290(n)).`
	CROSSREFS	`Cf. A000005, A000203, A000290, A001065, A032741, A152770.` `Sequence in context: A082264 A070532 A038217 this_sequence A077272 A009301 A087552` `Adjacent sequences: A152982 A152983 A152984 this_sequence A152986 A152987 A152988`
	KEYWORD	`nonn`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Dec 21 2008`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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