OFFSET
1,2
COMMENTS
If in the partition array M31hat(-5):=A145372 entries belonging to partitions with the same parts number m are summed one obtains this triangle of numbers S1hat(-5). In the same way the signless Stirling1 triangle |A008275| is obtained from the partition array M_2 = A036039.
The first column is [1,5,20,60,120,120,0,0,0,...]= A008279(5,n-1), n>=1.
LINKS
W. Lang, First 10 rows of the array and more.
W. Lang, Combinatorial Interpretation of Generalized Stirling Numbers, J. Int. Seqs. Vol. 12 (2009) 09.3.3.
FORMULA
EXAMPLE
[1];[5,1];[20,5,1];[60,45,5,1];[120,160,45,5,1];...
CROSSREFS
KEYWORD
AUTHOR
Wolfdieter Lang Oct 17 2008
STATUS
approved