611670

Appears in sequences

• a(n) = a(n-1) + 4*a(n-2) - 4*a(n-3) for n > 2; a(0)=2, a(1)=3, a(2)=6.at n=19A137208
• a(n) = a(n-1) + 2*a(n-2) with a(0)=3, a(1)=4.at n=18A171160
• Records in A269340.at n=11A269341
• a(n) = (2 + 7*4^n)/3.at n=9A308124