login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A364715 Numbers k such that d(k) < d(k+1) < d(k+2), where d(n) is the number of divisors of n. 2

%I #10 Aug 04 2023 08:16:13

%S 61,62,73,163,187,193,194,206,254,274,277,278,283,313,355,361,362,397,

%T 398,403,421,422,427,454,457,458,482,493,523,538,583,613,614,661,673,

%U 691,733,746,757,758,763,823,853,866,889,926,934,943,955,997,998,1003,1027

%N Numbers k such that d(k) < d(k+1) < d(k+2), where d(n) is the number of divisors of n.

%o (PARI) isok(n) = numdiv(n)<numdiv(n+1) && numdiv(n+1)<numdiv(n+2);

%Y Cf. A000005, A075028, A364659, A364718.

%Y Cf. A074775, A364716, A364717.

%K nonn,easy

%O 1,1

%A _Seiichi Manyama_, Aug 04 2023

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 24 02:58 EST 2024. Contains 370288 sequences. (Running on oeis4.)