A282427 - OEIS

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A282427

Numbers k such that A282442(k) = ceiling(k/2) + 1.

1, 3, 7, 39, 47, 111, 959, 3319, 7407, 11967, 13007, 16239

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

All terms are odd.

Proof: if A282442(2m) = m + 1, then the step of length m would have to have concluded on exactly the middle step, but a phase with step-length m cannot end on the middle step because the distance from the middle step to the top/bottom of the staircase is equal to m.

LINKS

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

Mathematics Stack Exchange user Sheljohn, A curious sequence.

CROSSREFS

Cf. A282442.

Sequence in context: A373774 A169741 A335812 * A192198 A061931 A057203

Adjacent sequences: A282424 A282425 A282426 * A282428 A282429 A282430

KEYWORD

nonn,more

AUTHOR

Peter Kagey, Feb 15 2017

STATUS

approved