OFFSET
0,2
FORMULA
a(n) = |S1(n+3, 3)| + |S1(n+3, 4)| = |S1(n+4, 4)| - (n+2)*|S1(n+3, 4)|, with S1(n, m):= A048994(n, m), n >= m >= 0 (Stirling1 triangle).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Feb 24 2005
STATUS
approved