A380423 Positions of ones in A380419.

1, 2, 3, 4, 5, 6, 9, 11, 13, 16, 18, 20, 22, 25, 27, 29, 31, 33, 36, 38, 40, 42, 60, 63, 65, 67, 69, 74, 80, 82, 84, 85, 88, 90, 92, 97, 100, 102, 103, 106, 107, 110, 112, 114, 117, 119, 121, 123, 126, 128, 130, 132, 135, 137, 139, 141, 143, 146, 148, 150, 153

Offset

1,2

Links

Table of n, a(n) for n=1..61.

Mathematica

(* A377091list is defined at A377091 *)
PositionIndex[Map[Boole[# == Range[Min[#], Max[#]] || # == Range[Max[#], Min[#], -1]] &, Most[SplitBy[A377091list[10000], Sign]]]][1]

Crossrefs

Cf. A377091, A379882, A380419, A380505.

Union of A380420 and A380422.

Sequence in context: A396278 A360011 A252484 * A036023 A119952 A364698

Adjacent sequences: A380420 A380421 A380422 * A380424 A380425 A380426

Keyword

nonn

Author

Paolo Xausa, Jan 25 2025

Status

approved