A364718 Numbers k such that d(k) > d(k+1) > d(k+2), where d(n) is the number of divisors of n.

45, 80, 81, 105, 165, 224, 225, 260, 261, 272, 315, 324, 345, 357, 384, 405, 435, 440, 441, 464, 465, 476, 477, 495, 512, 555, 560, 561, 567, 585, 594, 595, 620, 624, 627, 650, 651, 675, 704, 714, 715, 795, 800, 825, 836, 837, 855, 860, 861, 884, 885, 891, 896, 915

Offset: 1

Author

Seiichi Manyama, Aug 04 2023

Keywords

• nonn
• easy

Links

• Seiichi Manyama, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A000005, A075029, A364657.

Cf. A074827, A364719, A364720.

Programs

PARI

isok(n) = numdiv(n)>numdiv(n+1) && numdiv(n+1)>numdiv(n+2);