Power ceiling sequence of 2+sqrt(7).

Terms

a(0) =5a(1) =24a(2) =112a(3) =521a(4) =2421a(5) =11248a(6) =52256a(7) =242769a(8) =1127845a(9) =5239688a(10) =24342288a(11) =113088217a(12) =525379733a(13) =2440783584a(14) =11339273536a(15) =52679444897a(16) =244735600197