a(n) = period of the sequence [ x(k+1) := floor(2*cos(2*Pi/7)*x(k)) - x(k-1), with x(0) := cosh(n)^2, x(1) := sinh(n)^2 ].

A154411

a(n) = period of the sequence [ x(k+1) := floor(2*cos(2*Pi/7)*x(k)) - x(k-1), with x(0) := cosh(n)^2, x(1) := sinh(n)^2 ].

Terms

    a(0) =8a(1) =56a(2) =996a(3) =1680a(4) =5236a(5) =280a(6) =28a(7) =224a(8) =448a(9) =749196a(10) =728a(11) =980a(12) =420a(13) =112a(14) =1708a(15) =56a(16) =112a(17) =56a(18) =308a(19) =252a(20) =532a(21) =84a(22) =2156a(23) =28a(24) =84a(25) =280a(26) =29260a(27) =140a(28) =6454336a(29) =3220

External references