1001011001

Appears in sequences

• a(n) = concatenation of first n elements of Thue-Morse sequence A010059.at n=9A102397
• Binary strings that have 1's where 'evil numbers' occur, 0's elsewhere and every term ends with the n-th evil number index (counting with 0 = first).at n=4A109431
• Consider numbers m in the range 2^n <= m < 2^(n+1); the smallest A215244(m) in this range is k=A215245(n); a(n) = binary representation of m for the first time this k appears.at n=9A215254