Let M = 2 X 2 matrix [0, 1; 1, Pi]; then a(n) = 0 if n=0, 1 if n=1; and otherwise a(n) = floor(M^(n-1)[2,2]).

A138807

Let M = 2 X 2 matrix [0, 1; 1, Pi]; then a(n) = 0 if n=0, 1 if n=1; and otherwise a(n) = floor(M^(n-1)[2,2]).

Terms

    a(0) =0a(1) =1a(2) =3a(3) =10a(4) =37a(5) =128a(6) =439a(7) =1508a(8) =5179a(9) =17779a(10) =61033a(11) =209522a(12) =719266a(13) =2469165a(14) =8476377a(15) =29098491a(16) =99891986a(17) =342918422a(18) =1177201983a(19) =4041207525a(20) =13873029857a(21) =47624616207a(22) =163490174266a(23) =561244146614

External references