A080354 First differences of A080353.

2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1

Offset

0,1

Links

Table of n, a(n) for n=0..98.

Formula

Runs are 2^2, (2 1)^3, (2 1 1)^3, (2 1 1 1)^3, ...

Mathematica

Most[Table[#, 3]&/@Table[PadRight[{2}, n, 1], {n, 10}]//Flatten] (* Harvey P. Dale, Dec 08 2019 *)

Crossrefs

Sequence in context: A375583 A375582 A280314 * A374416 A238529 A374415

Adjacent sequences: A080351 A080352 A080353 * A080355 A080356 A080357

Keyword

nonn

Author

N. J. A. Sloane, Mar 20 2003

Status

approved