219440

Appears in sequences

• a(n) = 9973*n + 10007.at n=21A101442
• a(0),...,a(3) = 1, 2, 4, 8; thereafter a(n) = a(n-1) + 2*a(n-2) + 4*a(n-3) + 8*a(n-4), n>3.at n=13A102000