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A178169
Numbers in A178168, sorted.
3
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
1,2
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.
CROSSREFS
Sequence in context: A084280 A153534 A153563 * A191572 A191573 A136283
KEYWORD
nonn
AUTHOR
T. D. Noe, May 21 2010
STATUS
approved