Nearest integer to n*tau where tau = (1+sqrt(5))/2.

Terms

a(0) =0a(1) =2a(2) =3a(3) =5a(4) =6a(5) =8a(6) =10a(7) =11a(8) =13a(9) =15a(10) =16a(11) =18a(12) =19a(13) =21a(14) =23a(15) =24a(16) =26a(17) =28a(18) =29a(19) =31a(20) =32a(21) =34a(22) =36a(23) =37a(24) =39a(25) =40a(26) =42a(27) =44a(28) =45a(29) =47