OFFSET
0,3
COMMENTS
The blocks are ordered with increasing least elements.
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..28
Wikipedia, Partition of a set
FORMULA
a(n) = Sum_{k=0..max(0,n-1)} k * A363519(n,k).
EXAMPLE
a(3) = 9 = 1*1 + 4*2: 13|2, 123, 12|3, 1|23, 1|2|3.
a(4) = 35 = 3*1 + 4*2 + 8*3: 134|2, 13|24, 13|2|4, 124|3, 14|23, 14|2|3, 1|24|3, 1234, 123|4, 12|34, 12|3|4, 1|234, 1|23|4, 1|2|34, 1|2|3|4.
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jun 09 2023
STATUS
approved