Number of length 4+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third.
A248437
Number of length 4+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third.
Terms
- a(0) =2a(1) =9a(2) =28a(3) =101a(4) =198a(5) =327a(6) =462a(7) =691a(8) =932a(9) =1203a(10) =1474a(11) =1829a(12) =2184a(13) =2551a(14) =2954a(15) =3459a(16) =3964a(17) =4501a(18) =5038a(19) =5653a(20) =6286a(21) =6925a(22) =7564a(23) =8327a(24) =9114a(25) =9907a(26) =10712a(27) =11577a(28) =12442a(29) =13363
External references
- oeis: A248437