OFFSET
1,7
COMMENTS
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 1..2500
EXAMPLE
A161921 begins: 0, 0, 1, 2, 3, 7, 11, 17, 28, 43, 63, 96, 139, 199, 287, 406, 566, ...
Therefore a(n) begins 0, 0, 0, 1, 1, 1, 4, 4, 6, ..., counting 333; 3332; 33322; 555, 4443, 333222, 33333; etc.
MATHEMATICA
Join[{0}, Differences[Take[Differences[Table[PartitionsP[n], {n, 0, 100}], 2], {2, -1, 2}]]] (* Harvey P. Dale, Sep 02 2013 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Alford Arnold, May 25 2009, Jun 20 2009
EXTENSIONS
Extended and edited by Nathaniel Johnston, Apr 30 2011
STATUS
approved