[seqfan] Re: A true Mac Mahon ruler?

[Éric Angelini]

> Please leave the definitions of the old classic sequences alone.

... yes, of course Neil -- but the definition, hereunder, for
instance, was not 100% easy to understand (by me).
And BTW not a single example is present there, nor a comment:
bonne chance to the beginners!

https://oeis.org/A004978

Best,
É.

> 
> Clarifying comments are welcomed, of course.
>