OFFSET
1,7
COMMENTS
Number of partitions of n(n+1)/2 with all elements greater than n and less than 2n-1. - David Bevan, Sep 19 2011
LINKS
F. Faase, The cutting sticks problem
Mathematics Stack Exchange, Cutting sticks puzzle
FORMULA
a(n) = [x^(n*(n+1)/2)] Product_{k=n+1..2*n-2} 1/(1-x^k). - Sean A. Irvine, May 18 2019
EXAMPLE
a(4)=1: 10 can be partitioned as (5,5). - David Bevan, Sep 19 2011
MATHEMATICA
Table[Length[IntegerPartitions[n(n+1)/2, All, Range[n+1, 2n-2]]], {n, 20}] (* David Bevan, Sep 19 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(4) and a(5) corrected by David Bevan, Sep 19 2011
More terms from Alois P. Heinz, Sep 20 2012
STATUS
approved