Number of length n+2 0..5 arrays with every three consecutive terms having the sum of some two elements equal to twice the third.
A248430
Number of length n+2 0..5 arrays with every three consecutive terms having the sum of some two elements equal to twice the third.
Terms
- a(0) =42a(1) =70a(2) =118a(3) =198a(4) =342a(5) =590a(6) =1014a(7) =1766a(8) =3062a(9) =5286a(10) =9222a(11) =16006a(12) =27654a(13) =48262a(14) =83782a(15) =144774a(16) =252678a(17) =438662a(18) =758022a(19) =1323014a(20) =2296838a(21) =3969030a(22) =6927366a(23) =12026374a(24) =20782086a(25) =36272134a(26) =62970886a(27) =108816390a(28) =189923334a(29) =329719814
External references
- oeis: A248430