sequences related to table indexing

[Marc LeBrun]

I think it might be good to make an index entry or some similar page 
discussing sequences related to indexing tables and how they are used, and 
link to it in various places (eg the FAQ, table display pages, etc).

For example A025581 and A002262 are related to virtually every sequence 
derived by scanning a table along the antidiagonals.

I also sometimes use a different scan order, with n = A000695(i) + 2 
A000695(j), and there may be others.

And doubtless still other sequences are used to index other structures, 
such as trees or partitions.

Referring to these sequences and their conventional use explicitly in every 
TABL entry seems excessive.

On the other hand the commentaries often only vaguely refer to a "table" or 
"triangle", and usage may be inconsistent.

Centrally documenting this might be particularly helpful for new users and 
submissions.

A small addition (I'd be happy to supply a first draft) in this area might 
be helpful.  What do you think?