A380422 Positions of ones in A380418.

1, 3, 5, 60, 63, 69, 80, 84, 102, 106, 117, 189, 193, 204, 210, 231, 237, 241, 249, 252, 258, 277, 281, 292, 301, 400, 432, 459, 464, 470, 476, 484, 487, 503, 507, 512, 516, 536, 540, 551, 560, 578, 582, 592, 713, 718, 722, 751, 769, 773, 782, 785, 795, 799, 803

Offset

1,2

Links

Table of n, a(n) for n=1..55.

Mathematica

(* A377091list is defined at A377091 *)
PositionIndex[Map[Boole[# == Range[Max[#], Min[#], -1]] &, Abs[Most[SplitBy[A377091list[20000], Sign]]]]][1]

Crossrefs

Cf. A377091, A379882, A380418, A380420, A380423, A380504.

Sequence in context: A249011 A261533 A118477 * A320082 A273254 A222644

Adjacent sequences: A380419 A380420 A380421 * A380423 A380424 A380425

Keyword

nonn

Author

Paolo Xausa, Jan 25 2025

Status

approved