A380420 Positions of ones in A380417.

1, 2, 4, 6, 9, 11, 13, 16, 18, 20, 22, 25, 27, 29, 31, 33, 36, 38, 40, 42, 65, 67, 74, 82, 85, 88, 90, 92, 97, 100, 103, 107, 110, 112, 114, 119, 121, 123, 126, 128, 130, 132, 135, 137, 139, 141, 143, 146, 148, 150, 153, 155, 157, 159, 162, 164, 166, 170, 173, 175

Offset

1,2

Links

Table of n, a(n) for n=1..60.

Mathematica

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

Crossrefs

Cf. A377091, A379882, A380417, A380422, A380423, A380503.

Sequence in context: A330908 A327213 A322532 * A383009 A284365 A059545

Adjacent sequences: A380417 A380418 A380419 * A380421 A380422 A380423

Keyword

nonn

Author

Paolo Xausa, Jan 25 2025

Status

approved