Number of length 4+4 0..n arrays with every five consecutive terms having two times the sum of some three elements equal to three times the sum of the remaining two.

A248991

Number of length 4+4 0..n arrays with every five consecutive terms having two times the sum of some three elements equal to three times the sum of the remaining two.

Terms

    a(0) =2a(1) =53a(2) =204a(3) =585a(4) =2494a(5) =8873a(6) =20128a(7) =41419a(8) =70770a(9) =133223a(10) =222176a(11) =361717a(12) =538634a(13) =788117a(14) =1143690a(15) =1636069a(16) =2229208a(17) =2986485a(18) =3852114a(19) =5061161a(20) =6453778a(21) =8167835a(22) =10095656a(23) =12387261a(24) =15118434a(25) =18394433a(26) =21989412a(27) =26180385a(28) =30730830a(29) =36337853

External references