Recamán's Sequence

RECAMÁN

a(0)=0; if a(n-1)−n > 0 and unseen, jump backward; else jump forward.
OEIS A005132

First n where a(n) = ?

Color mode

Fade old arcs

Arc glow

Animate head

Stroke 1.2

Play sound on each step

Scale

Vol 35

Range 3 oct

n drawn0

a(n)0

max value0

distinct hit1

backward %—

smallest miss—

Space play/pause R reset
← → step ±1 Shift+← → ±10
B build now F fit S sound
Set a length, then Build (instant) or Play (animated).

SEMICIRCLE ARCS · alternating above/below

paused

n = 0 / 100

Speed 40ms

Step

0 / 100

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