Number of length 2+3 0..n arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.
A249292
Number of length 2+3 0..n arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.
Terms
- a(0) =26a(1) =168a(2) =660a(3) =2228a(4) =5646a(5) =12600a(6) =25280a(7) =46608a(8) =80334a(9) =131672a(10) =206112a(11) =311352a(12) =455954a(13) =649920a(14) =904884a(15) =1235024a(16) =1654734a(17) =2181960a(18) =2836016a(19) =3638460a(20) =4613010a(21) =5786924a(22) =7188012a(23) =8848968a(24) =10803998a(25) =13090368a(26) =15748356a(27) =18822884a(28) =22359246
External references
- oeis: A249292