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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A124873 Indices of local maxima in sequence A007408. 1
 5, 17, 19, 41, 43, 53, 65, 99, 109, 118, 147, 152, 155, 161, 234, 247, 271, 293, 317, 341, 480, 483, 485, 499, 505, 681, 725, 752, 811, 850, 889, 929, 1183, 1209, 1331, 1457, 1560, 1639, 1805, 1875, 1926, 2009, 2022, 2027, 2057, 2161, 2411, 2437, 2499, 2545 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Up to n=200, A007408(n) behaves roughly like 10^(1.3 n) and there are only 14 points (for n < 200) such that A007408(n) >= A007408(n+1); they are all such that A007408(n) > A007408(n+1) < A007408(n+2). LINKS Rémy Sigrist, Table of n, a(n) for n = 1..500 EXAMPLE a(1) = 5 since k=5 is the smallest index such that A007408(k) >= A007408(k+1). MAPLE select(n->A007408(n)>=A007408(n+1), [\$1..200]); PROG (PARI) v=s=0; for (n=1, 2546, if (v>=v=numerator(s+=1/n^3), print1 (n-1", "))) \\ Rémy Sigrist, Jun 03 2019 CROSSREFS Cf. A007408. Sequence in context: A140568 A019349 A226627 * A129745 A304129 A038964 Adjacent sequences: A124870 A124871 A124872 * A124874 A124875 A124876 KEYWORD hard,nonn AUTHOR M. F. Hasler, Nov 11 2006 EXTENSIONS More terms from Rémy Sigrist, Jun 03 2019 STATUS approved

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.

Last modified February 8 23:03 EST 2023. Contains 360153 sequences. (Running on oeis4.)