A030412 a(n) = (# 1's)-(# 2's) in first n terms of A030401.

1, 1, 2, 3, 4, 4, 3, 4, 3, 3, 3, 4, 4, 4, 5, 5, 6, 7, 7, 7, 8, 9, 10, 11, 12, 12, 13, 12, 13, 14, 13, 13, 14, 14, 15, 16, 16, 16, 15, 15, 16, 15, 15, 15, 14, 15, 16, 15, 16, 16, 15, 14, 15, 14, 13, 13, 12, 12, 13, 12, 12, 12, 12, 12, 13, 13, 13, 13

Offset

1,3

Links

Table of n, a(n) for n=1..68.

Crossrefs

Cf. A030401.

Sequence in context: A128863 A117391 A129456 * A329526 A160371 A059686

Adjacent sequences: A030409 A030410 A030411 * A030413 A030414 A030415

Keyword

nonn

Author

Clark Kimberling

Status

approved