42398

Appears in sequences

• Least k such that the first k terms of the Kolakoski sequence (A000002) contain n more 2's than 1's.at n=21A025503
• a(n) = A026637(2*n, n-2).at n=7A026640
• Position of first appearance of each integer in A088568 (number of 1's minus number of 2's in first n terms of A000002).at n=33A288605
• a(n) = index where A088568 (or equally A294448) first reaches or exceeds n in magnitude.at n=21A294449