Number of length n+3 0..3 arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.
A249285
Number of length n+3 0..3 arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.
Terms
- a(0) =204a(1) =660a(2) =2144a(3) =6960a(4) =22572a(5) =73204a(6) =237480a(7) =770416a(8) =2499164a(9) =8107012a(10) =26298608a(11) =85311248a(12) =276744204a(13) =897739412a(14) =2912207432a(15) =9447011744a(16) =30645489228a(17) =99411957620a(18) =322485877472
External references
- oeis: A249285