id:A115167 - OEIS Search Results

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Odd numbers n such that n-1 and n+1 have the same number of prime divisors with multiplicity.

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5, 19, 29, 43, 51, 55, 67, 69, 77, 89, 115, 151, 171, 173, 187, 189, 197, 233, 237, 243, 245, 249, 267, 271, 283, 285, 291, 295, 307, 317, 329, 341, 343, 349, 355, 403, 405, 411, 427, 429, 435, 437, 461, 489, 491, 507, 569, 571, 593, 597, 603, 605, 653, 665 (list; graph; listen)

	OFFSET	`1,1`
	PROGRAM	`(PARI) g(n) = forstep(x=3, n, 2, p1=bigomega(x-1); p2=bigomega(x+1); if(p1==p2, print(x", ")))`
	CROSSREFS	`Sequence in context: A106072 A106062 A045456 this_sequence A115103 A045457 A138242` `Adjacent sequences: A115164 A115165 A115166 this_sequence A115168 A115169 A115170`
	KEYWORD	`easy,nonn`
	AUTHOR	`Cino Hilliard (hillcino368(AT)gmail.com), Mar 03 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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