A142716 First differences of A140495.

1, 1, 1, 3, 3, 3, 3, 6, 6, 9, 9, 18, 18, 18, 45, 36, 45, 99, 81, 108, 216, 189, 243, 486, 432, 540, 1107, 972, 1215, 2511, 2187, 2754, 5670, 4941, 6237, 12798, 11178, 14094, 28917, 25272, 31833, 65367, 57105, 71928, 147744, 129033, 162567

Offset: 1

Author

Paul Curtz, Sep 26 2008

Keywords

• nonn

Formula

3 | a(n), n>3.