login
This site is supported by donations to The OEIS Foundation.

 

Logo

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A082915 Numbers n for which the first difference sequence of A054040 decreases. 1
27, 53, 179, 305, 431, 557, 683, 809, 835, 935, 961, 1087, 1213, 1339, 1465, 1591, 1717, 1743, 1843, 1869, 1995, 2121, 2247, 2373, 2499, 2525, 2625, 2651, 2777, 2903, 3029, 3155, 3281, 3407, 3433, 3533, 3559, 3685, 3811, 3937, 4063, 4189, 4215, 4315 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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

LINKS

Table of n, a(n) for n=1..44.

EXAMPLE

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

MATHEMATICA

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}]

CROSSREFS

Cf. A054040.

Sequence in context: A160845 A216224 A255364 * A183032 A040702 A043323

Adjacent sequences:  A082912 A082913 A082914 * A082916 A082917 A082918

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Apr 14 2003

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy .

Last modified August 17 21:22 EDT 2017. Contains 290656 sequences.