Proposes updates to A033178, A033179.
David Wasserman
dwasserm at earthlink.com
Fri Apr 8 05:26:51 CEST 2005
>%C A033178 The multiset {n, 2, 1x(n-2)} ....
Is this a standard notation for multisets? I haven't seen it before, but I haven't read much about multisets. I do know that in non-mathematical writing, it's common to use x to indicate repetition, and the number of repetitions usually comes before the x. So "1x(n-2)" is ambiguous. I think "(n-2)x 1" would be clearer. You could also just put "1, 1, ..., 1"; the number of 1s can be inferred from the fact that the multiset has n elements.
v/r,
David
More information about the SeqFan
mailing list