A050487 Geometric Connell sequence: start with 1; then next two numbers == 2 mod 3; next four == 3 mod 3; next eight == 1 mod 3; etc.
1, 2, 5, 6, 9, 12, 15, 16, 19, 22, 25, 28, 31, 34, 37, 38, 41, 44, 47, 50, 53, 56, 59, 62, 65, 68, 71, 74, 77, 80, 83, 84, 87, 90, 93, 96, 99, 102, 105, 108, 111, 114, 117, 120, 123, 126, 129, 132, 135, 138, 141, 144, 147, 150, 153, 156, 159, 162
Offset: 1
Links
- R. Stephan, Some divide-and-conquer sequences ...
- R. Stephan, Table of generating functions
Formula
a(n) = 3*n - 2*(1 + floor(log_2(n))).
Extensions
More terms from Ralf Stephan, Oct 11 2003