Boys and a girl partition
franktaw at netscape.net
franktaw at netscape.net
Sun May 14 17:30:37 CEST 2006
It certainly is in the OEIS. This is A000070: the cumulative sum of the
number of partitions of n.
Let k be the number of boys in the partition that contains the girl.
Then the remaining parts are an arbitrary partition of n-k-1.
Franklin T. Adams-Watters
-----Original Message-----
From: koh <zbi74583 at boat.zero.ad.jp>
Hi,Seqfans
I considered partitions of a set which has {n-1} boys and a girl.
S : 1,2,4,7,12,19,30
n=5
{o,o,o,o,*},{o,o,*,oo},{o,o,o,o*},{*,oo,oo},{o,oo,o*},
{o,*,ooo},{o,o,oo*},{o*,ooo},{oo,oo*},{*,oooo},{o,ooo*},{oooo*}?
"o" means a boy, "*" means a girl.
It doesn't seem to exist on OEIS.
I will submit it.
I wish someone verify it.
Are all terms correct?
Yasutoshi
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