293504

Appears in sequences

• a(n) = Sum_{k >= 0} 2^k * binomial(k+2,n-2*k).at n=22A061279
• a(n) = 4*a(n-1) - 4*a(n-2) + 4*a(n-3) with a(0) = 1, a(1) = 3, a(2) = 10.at n=11A247595
• Binomial transform of the Gray code sequence.at n=15A372304