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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A082915 Numbers n for which the first difference sequence of A054040 decreases. 1

%I

%S 27,53,179,305,431,557,683,809,835,935,961,1087,1213,1339,1465,1591,

%T 1717,1743,1843,1869,1995,2121,2247,2373,2499,2525,2625,2651,2777,

%U 2903,3029,3155,3281,3407,3433,3533,3559,3685,3811,3937,4063,4189,4215,4315

%N Numbers n for which the first difference sequence of A054040 decreases.

%C Same as asking when the second difference of A054040 is -1.

%e A054040(27)-A054040(26) = 13 while A054040(26)-A054040(25) = 14, therefore the first entry is 27.

%t k = s = a = b = c = 0; Do[m = n; While[s < n, k++; s = N[s + 1/Sqrt[k], 50]]; a = b; b = c; c = k; If[2b - a > c, Print[n]], {n, 1, 4400}]

%Y Cf. A054040.

%K nonn

%O 1,1

%A _Robert G. Wilson v_, Apr 14 2003

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 December 8 17:38 EST 2022. Contains 358698 sequences. (Running on oeis4.)