Number of length 6+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third.
A248439
Number of length 6+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) =44a(3) =261a(4) =590a(5) =1105a(6) =1684a(7) =2775a(8) =3978a(9) =5365a(10) =6776a(11) =8639a(12) =10512a(13) =12467a(14) =14562a(15) =17349a(16) =20144a(17) =23213a(18) =26282a(19) =29727a(20) =33264a(21) =36831a(22) =40398a(23) =44775a(24) =49264a(25) =53769a(26) =58386a(27) =63261a(28) =68136a(29) =73375
External references
- oeis: A248439