A255336 a(n) = A005811(A255056(n)); After the initial zero, the first differences of A255056.

0, 2, 2, 2, 4, 2, 2, 4, 4, 4, 2, 2, 2, 4, 6, 4, 4, 4, 4, 2, 2, 2, 4, 6, 4, 6, 6, 4, 2, 4, 6, 4, 4, 4, 4, 2, 2, 2, 4, 6, 4, 6, 4, 4, 6, 6, 6, 6, 6, 4, 2, 4, 6, 4, 6, 6, 4, 2, 4, 6, 4, 4, 4, 4, 2, 2, 2, 4, 6, 4, 6, 4, 4, 6, 6, 6, 6, 4, 4, 6, 6, 6, 8, 6, 6, 6, 6, 6, 6, 4, 2, 4, 6, 4, 6, 4, 4, 6, 6, 6, 6, 6, 4, 2, 4, 6, 4, 6, 6, 4, 2, 4, 6, 4, 4, 4, 4, 2, 2

Offset: 0

Author

Antti Karttunen, Feb 21 2015

Keywords

• nonn

Comments

First differences of A255056, shifted once right (prepended with zero).

Links

• Antti Karttunen, Table of n, a(n) for n = 0..8590

Crossrefs

First differences of A255056.

Terms of A255337 doubled.

Cf. A005811.

Analogous sequence: A213712.

Formula

a(n) = A005811(A255056(n)).

a(0) = 0; and for n >= 1: a(n) = A255056(n) - A255056(n-1).

a(n) = 2*A255337(n).