id:A075026 - OEIS Search Results

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Define a number k to occupy a divisor cavity if d(k-1) > d(k) < d(k+1) where d(k) is the number of divisors of k. Sequence gives composite numbers occupying a divisor cavity.

+0
4

9, 25, 49, 51, 55, 65, 69, 77, 91, 111, 115, 121, 125, 129, 153, 155, 161, 169, 175, 183, 185, 187, 209, 221, 235, 237, 247, 249, 259, 265, 267, 274, 287, 289, 291, 295, 305, 309, 319, 321, 323, 329, 339, 341, 343, 351, 355, 361, 365, 369, 371, 377, 386, 391 (list; graph; listen)

	OFFSET	`0,1`
	CROSSREFS	`Cf. A075025, A075027.` `Sequence in context: A114057 A031036 A051132 this_sequence A113659 A113745 A016754` `Adjacent sequences: A075023 A075024 A075025 this_sequence A075027 A075028 A075029`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 02 2002`
	EXTENSIONS	`Corrected and extended by Jason Earls (zevi_35711(AT)yahoo.com), Sep 04 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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