A178169 Numbers in A178168, sorted.

1, 2, 8, 64, 1024, 5120, 32768, 51200, 153600, 921600, 1024000, 2097152, 11059200, 40960000, 44040192, 265420800, 268435456, 532480000, 1849688064, 3276800000, 12740198400, 13844480000, 68719476736, 155373797376, 524288000000

Offset: 1

Author

T. D. Noe, May 21 2010

Keywords

• nonn

Comments

At least the first 12332052 terms of this sequence are unique. It is conjectured that all terms are unique. The sequence is easy to compute by generating the Collatz tree on the fly while keeping track of products.

Links

• T. D. Noe, Table of n, a(n) for n=1..1000