OFFSET
1,4
LINKS
Giovanni Resta, Table of n, a(n) for n = 1..500
FORMULA
a(n) = p(n) - p(ceiling(n/2)) = A000041(n) - A000041(ceiling(n/2)), for n>1. - Giovanni Resta, Mar 02 2014
EXAMPLE
a(6) counts all the 11 partitions of 6 except 33, 321, 3111.
MATHEMATICA
Table[Count[IntegerPartitions[n], p_ /; !MemberQ[p, Floor[n/2]]], {n, 50}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Feb 28 2014
STATUS
approved