Number of length n+2 0..6 arrays with every three consecutive terms having the sum of some two elements equal to twice the third.
A248431
Number of length n+2 0..6 arrays with every three consecutive terms having the sum of some two elements equal to twice the third.
Terms
- a(0) =61a(1) =105a(2) =185a(3) =327a(4) =601a(5) =1105a(6) =2021a(7) =3761a(8) =6969a(9) =12815a(10) =23897a(11) =44337a(12) =81597a(13) =152209a(14) =282457a(15) =519895a(16) =969849a(17) =1799825a(18) =3312853a(19) =6180081a(20) =11468921a(21) =21110367a(22) =39381145a(23) =73083121a(24) =134521133a(25) =250947665a(26) =465706137a(27) =857206439a(28) =1599109049a(29) =2967610449
External references
- oeis: A248431