Sum of generalized tribonacci numbers (A001644) and reflected generalized tribonacci numbers (A073145).

A075092

Sum of generalized tribonacci numbers (A001644) and reflected generalized tribonacci numbers (A073145).

Terms

    a(0) =6a(1) =0a(2) =2a(3) =12a(4) =6a(5) =20a(6) =50a(7) =56a(8) =134a(9) =264a(10) =402a(11) =836a(12) =1542a(13) =2652a(14) =5154a(15) =9392a(16) =16902a(17) =31824a(18) =58082a(19) =106172a(20) =197126a(21) =360932a(22) =662994a(23) =1223784a(24) =2245766a(25) =4130520a(26) =7606770a(27) =13976436a(28) =25711622a(29) =47310252

External references