login
a(n) = floor(((1+sqrt(3))/2)^n).
1

%I #6 Jul 19 2021 19:12:32

%S 1,1,2,3,4,6,8,12,16,22,30,42,57,78,107,147,200,274,374,511,699,955,

%T 1304,1782,2434,3326,4543,6206,8478,11581,15820,21611,29521,40327,

%U 55088,75251,102795,140421,191819,262030,357939,488954,667924,912401,1246364

%N a(n) = floor(((1+sqrt(3))/2)^n).

%t Table[Floor[((1 + Sqrt[3])/2)^n], {n, 1, 100}]

%Y Cf. A125890-A125899.

%K nonn

%O 1,3

%A _Artur Jasinski_, Dec 13 2006