A088570 Sum of terms in n-th block of Kolakoski sequence.

1, 4, 2, 2, 1, 4, 1, 4, 2, 2, 2, 4, 1, 2, 2, 2, 1, 4, 2, 2, 2, 2, 1, 4, 1, 4, 2, 2, 1, 4, 1, 2, 2, 2, 2, 4, 1, 4, 2, 2, 1, 4, 1, 4, 2, 2, 2, 2, 1, 4, 1, 2, 2, 4, 1, 4, 2, 2, 1, 4, 1, 4, 2, 2, 2, 4, 1, 2, 2, 2, 1, 4, 1, 4, 2, 2, 2, 2, 1, 4, 2, 2, 2, 4, 1, 2, 2, 2, 2, 4, 1, 4, 2, 2, 1, 4, 1, 2, 2, 4, 1, 4, 1, 2, 2

Offset

1,2

Links

Table of n, a(n) for n=1..105.

Formula

a(n) = (3+(-1)^n)/2*A000002(n).

Crossrefs

Cf. A000002.

Positions of 1's are A335075.

Sequence in context: A375735 A264752 A325527 * A102888 A071558 A179621

Adjacent sequences: A088567 A088568 A088569 * A088571 A088572 A088573

Keyword

nonn

Author

Benoit Cloitre, Nov 17 2003

Status

approved