reflected sequences

Michael Somos somos at
Fri Sep 20 23:33:43 CEST 2002


     Just recently I have noticed some OEIS entries referring to
"reflected" sequences. Apparently what is meant is that there is
a natural function from integers to integers and the sequence

a(0),a(1),a(2),....  is a reflection of  a(-1),a(-2),a(-3),...  .

One could also argue for a(0),a(-1),a(-2),...  as being reflection
of the original sequence. Perhaps it is time to introduce a good
convention to use for purposes of OEIS? That way one could have
comments such as a(n)=n^2 is its own reflection. Shalom, Michael

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