Number of length 1+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.

A248538

Number of length 1+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) =101a(4) =198a(5) =331a(6) =512a(7) =753a(8) =1066a(9) =1439a(10) =1908a(11) =2461a(12) =3110a(13) =3867a(14) =4744a(15) =5729a(16) =6858a(17) =8119a(18) =9524a(19) =11085a(20) =12814a(21) =14699a(22) =16776a(23) =19033a(24) =21482a(25) =24135a(26) =27004a(27) =30077a(28) =33390a(29) =36931

External references