a(n) = A(n)*7^(-floor(n+1)/3), where A(n) = 7*A(n-1) - 14*A(n-2) + 7*A(n-3) with A(0)=0, A(1)=1, A(2)=7.

A217444

a(n) = A(n)*7^(-floor(n+1)/3), where A(n) = 7*A(n-1) - 14*A(n-2) + 7*A(n-3) with A(0)=0, A(1)=1, A(2)=7.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =5a(4) =22a(5) =13a(6) =52a(7) =204a(8) =113a(9) =435a(10) =1667a(11) =910a(12) =3471a(13) =13224a(14) =7192a(15) =27367a(16) =104105a(17) =56563a(18) =215098a(19) =817909a(20) =444276a(21) =1689212a(22) =6422529a(23) =3488381a(24) =13262821a(25) =50424942a(26) =27387681a(27) =104126704a(28) =395884336a(29) =215018609

External references