A125284 Lower indices of duplicate terms in A125204, i.e., k such that A125204(k) = A125204(k + 1).

3, 18, 35, 37, 148, 741, 752, 6814, 13976, 150095, 517213, 11874105

Offset

1,1

Links

Table of n, a(n) for n=1..12.

Example

18 is in the sequence because A125204(18) = A125204(19) = 266.

Mathematica

l = {0, 1}; Do[x = l[[n]] + l[[Mod[l[[n]], n] + 1]]; If[x == l[[n]], Print[n - 1]]; AppendTo[l, x], {n, 2, 10^9}]

Crossrefs

Cf. A125204.

Sequence in context: A204192 A108169 A063116 * A372707 A097989 A039700

Adjacent sequences: A125281 A125282 A125283 * A125285 A125286 A125287

Keyword

hard,more,nonn

Author

Ryan Propper, Jan 25 2007

Status

approved