649728

Appears in sequences

• Fennessey-Larcombe-French sequence.at n=5A065409
• Maximum number of odd 2 X 2 submatrices over all 2n X 2n (0,1) matrices.at n=23A093699
• a(n) = Sum_{j=0..n} n^wt(j), where wt = A000120.at n=23A361257