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A140578
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A positive integer n is included if n is the smallest integer in a run of a plural number of consecutive integers all with the same number of divisors.
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0
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2, 14, 21, 26, 33, 38, 44, 57, 75, 85, 93, 98, 104, 116, 118, 122, 133, 135, 141, 145, 147, 158, 171, 177, 189, 201, 205, 213, 217, 230, 242, 253, 285, 296, 298, 301, 326, 332, 334, 344, 374, 381, 387, 393, 429, 434, 445, 453, 481, 501, 507, 514, 526, 537, 542
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| All terms of this sequence are included in sequence A005237.
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EXAMPLE
| d(33) = d(34) = d(35), where d(n) is the number of divisors of n. And since d(32) does not equal d(33), d(33) is the first term of this run of similar values. So 33 is included in this sequence.
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CROSSREFS
| Cf. A005237.
Sequence in context: A131221 A138047 A005237 * A052213 A086263 A073143
Adjacent sequences: A140575 A140576 A140577 * A140579 A140580 A140581
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KEYWORD
| nonn
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AUTHOR
| Leroy Quet Jul 05 2008
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EXTENSIONS
| Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jun 25 2009
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