Number of length 7+2 0..n arrays with every three consecutive terms having the sum of some two elements equal to twice the third.

A248440

Number of length 7+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) =52a(3) =389a(4) =1014a(5) =2021a(6) =3200a(7) =5589a(8) =8218a(9) =11401a(10) =14696a(11) =18947a(12) =23274a(13) =27861a(14) =32772a(15) =39481a(16) =46246a(17) =53633a(18) =61036a(19) =69369a(20) =77910a(21) =86569a(22) =95228a(23) =105879a(24) =116826a(25) =127859a(26) =139132a(27) =150965a(28) =162798a(29) =175561

External references