OFFSET
1,2
COMMENTS
All parts of the integer partition must be used in such a combination.
LINKS
Charlie Neder, Table of n, a(n) for n = 1..46
EXAMPLE
The a(7) = 20 partitions (which are not all partitions of 7):
(7),
(61), (52), (43),
(511), (321), (421), (331), (322),
(3111), (4111), (2211), (3211), (2221),
(21111), (31111), (22111),
(111111), (211111),
(1111111).
This list contains (2211) because we can write 7 = (2+1)*2+1. It contains (321) because we can write 7 = 3*2+1, even though the sum of parts is only 6.
CROSSREFS
KEYWORD
nonn
AUTHOR
Gus Wiseman, Oct 01 2018
EXTENSIONS
a(13)-a(41) from Charlie Neder, Jun 02 2019
STATUS
approved