OFFSET
1,3
COMMENTS
Difference of numbers sum(product(j!^e(n,m,k,j),j=1..n),k=1..p(n,m)) related to odd and even part m partitions of n. Here e(n,m,k,j) is the exponent of j in the k-th m part partition of n and p(n,m)=A008284(n,m) is the number of partitions of n with m parts.
FORMULA
a(n)=sum(A134134(n,m)*(-1)^(m-1),m=1..n),n>=1.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang Oct 12 2007
STATUS
approved