Number of length 2+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.
A248539
Number of length 2+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.
Terms
- a(0) =2a(1) =15a(2) =52a(3) =113a(4) =246a(5) =427a(6) =704a(7) =1113a(8) =1654a(9) =2279a(10) =3072a(11) =4045a(12) =5210a(13) =6555a(14) =8116a(15) =9953a(16) =12054a(17) =14383a(18) =16976a(19) =19929a(20) =23194a(21) =26735a(22) =30636a(23) =34993a(24) =39686a(25) =44751a(26) =50212a(27) =56201a(28) =62646a(29) =69451
External references
- oeis: A248539