[seqfan] A026480

[israel at math.ubc.ca]

A026480: "a(n) = least positive integer > a(n-1) and not a(i)*a(j)*a(k) for 
1<=i<=j<=k<=n." has Data 1, 2, 4, 5, 6, 7, 9, 11, 13, 15, 17, 19, 21, 23, 
27, 29, 31, 33, 37, 39, 41, 43, 47, 51, 53, 57, 59, 61, 67, 69.

This doesn't make any sense to me. Since a(1) = 1, any a(n) = 
a(i)*a(j)*a(k) for the case i=j=1, k=n. Or if you don't allow this, the 
sequence would be the same as A026478: "a(n) = least positive integer > 
a(n-1) and not of form a(i)*a(j)*a(k) for 1<=i<=j<=k<n."

What is this sequence supposed to be?

Cheers,
Robert