id:A152989 - OEIS Search Results

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Sum of proper divisors minus the number of proper divisors of triangular number A000217(n).

+0
2

0, 0, 3, 5, 6, 8, 23, 47, 28, 14, 71, 83, 18, 80, 225, 127, 76, 84, 163, 351, 146, 32, 385, 551, 104, 202, 567, 307, 278, 296, 487, 941, 296, 262, 1219, 805, 54, 372, 1549, 933, 476, 498, 631, 1795, 826, 68, 1737, 2221, 534, 946, 1683, 883, 722, 1380, 2469, 2861, 740, 86, 2535 (list; graph; listen)

	OFFSET	`1,3`
	LINKS	`B. D. Swan, Table of n, a(n) for n=1,...,10000`
	FORMULA	`a(n)=A001065(A000217(n))-A032741(A000217(n)) = A152770(A000217(n)).`
	CROSSREFS	`Cf. A000005, A000203, A000217, A001065, A032741, A152770.` `Sequence in context: A039014 A102989 A005623 this_sequence A016612 A098587 A161182` `Adjacent sequences: A152986 A152987 A152988 this_sequence A152990 A152991 A152992`
	KEYWORD	`nonn`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Dec 20 2008`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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