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

Author

Benoit Cloitre, Nov 17 2003

Keywords

• nonn

Crossrefs

Cf. A000002.

Formula

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