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A188598 Numbers k such that d(k-1) > d(k) > d(k+1) where d(k) is the number of divisors of k. 1
46, 81, 82, 106, 166, 225, 226, 261, 262, 273, 316, 325, 346, 358, 385, 406, 436, 441, 442, 465, 466, 477, 478, 496, 513, 556, 561, 562, 568, 586, 595, 596, 621, 625, 628, 651, 652, 676, 705, 715, 716, 796, 801, 826, 837, 838, 856, 861, 862, 885, 886, 892, 897, 916, 925, 946, 976, 981, 982 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A000005(a(n)-1) > A000005(a(n)) > A000005(a(n)+1).

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[Range[2, 1000], DivisorSigma[0, # - 1] > DivisorSigma[0, #] > DivisorSigma[0, # + 1] &] (* T. D. Noe, Apr 05 2011 *)

CROSSREFS

Cf. A000005, A188631, A075029.

Sequence in context: A245372 A020351 A113691 * A057454 A260278 A234260

Adjacent sequences:  A188595 A188596 A188597 * A188599 A188600 A188601

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Apr 05 2011

EXTENSIONS

Corrected and extended by T. D. Noe, Apr 05 2011

STATUS

approved

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Last modified May 23 11:46 EDT 2022. Contains 353975 sequences. (Running on oeis4.)