OFFSET
1,2
COMMENTS
This is the array ay(N,m)= A104471(n+m-1,m) with numbers m>N omitted because they are identical with ay(N,N).
a(n,m)=sum(j*floor(n/j),j=1..m), n>=m and zero else (but actually one should repeat the a(n,n) numbers for n<m).
LINKS
EXAMPLE
[1]; [2,4]; [3,5,8]; [4,8,11,15]; [5,9,12,16,21]; ...
CROSSREFS
KEYWORD
AUTHOR
Wolfdieter Lang, Mar 24 2005
STATUS
approved