STATUS
reviewed
approved
reviewed
approved
proposed
reviewed
editing
proposed
Rémy Sigrist, <a href="/A317585/b317585.txt">Table of n, a(n) for n = 1..10000</a>
approved
editing
proposed
approved
editing
proposed
For n = 5:
- |a(1) - a(4)| = |0 - 3| = 3 > 2,
- |a(2) - a(3)| = |1 - 2| = 1 <= 2,
- |a(3) - a(2)| = |2 - 1| = 1 <= 2,
- |a(4) - a(1)| = |3 - 0| = 3 > 2,
- hence a(5) = 2.
Rémy Sigrist, <a href="/A317585/a317585.png">Colored scatterplot of the first 100000 terms</a> (where the color is function of the parity of n)
(PARI) a = vector(75); for (n=1, #a, a[n] = sum(k=1, n-1, abs(a[k]-a[n-k])<=2); print1 (a[n] ", "))