A324792 First differences of A325056: distance in A076042 from n-th low point to the next.

5, 5, 9, 15, 25, 45, 77, 133, 231, 401, 693, 1201, 2081, 3603, 6241, 10809, 18723, 32429, 56169, 97287, 168505, 291861, 505517, 875581, 1516551, 2626743, 4549653, 7880231, 13648959, 23640691, 40946879, 70922073, 122840635, 212766221, 368521905, 638298663

Offset

0,1

Links

Giovanni Resta, Table of n, a(n) for n = 0..41

Mathematica

a=b=c=d=n=0; L={0}; While[Length[L] < 22, n++; a=b; b=c; c=d; d=c + If[c < n^2, n^2, -n^2]; If[a > b < c < d, AppendTo[L, n-2]]]; Differences@ L (* Giovanni Resta, Oct 01 2019 *)

Crossrefs

Cf. A076042, A325056, A324791.

If we use primes instead of squares we get A008348, A309226, A324782, A324783.

Sequence in context: A047880 A058491 A058584 * A147197 A323301 A147047

Adjacent sequences: A324789 A324790 A324791 * A324793 A324794 A324795

Keyword

nonn

Author

N. J. A. Sloane, Sep 04 2019

Extensions

More terms from Giovanni Resta, Oct 01 2019

Status

approved