[seqfan] A123712 and A178212
Peter Luschny
peter.luschny at googlemail.com
Thu Feb 9 14:33:08 CET 2012
What does A123712(n) mean? The definition is:
A123712 Positions in A123709 equal to 16, so that row a(n)
of triangle A123706 has exactly 16 nonzero terms.
To understand this I have to know that
A123709 a(n) = number of nonzero elements in row n of triangle A123706.
To understand this I have to know that
A123706 Matrix inverse of triangle A010766
To understand this I have to know that
A010766 Triangle of numbers [ n/k ], k=1..n.
Alright, so what does A123712(n) mean, put in colloquial terms?
My motivation comes from comparing A123712 with A178212. Are they equal?
http://oeis.org/search?q=A123712+A178212
Peter
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