OFFSET
0,4
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..2500 (terms n = 1..700 from Fausto A. C. Cariboni)
EXAMPLE
a(7)=5 because there are 5 such partition of 7: {7}, {1,6}, {2,5}, {3,4}, {4,2,1}.
MATHEMATICA
<< DiscreteMath`Combinatorica`; np[n_]:= Length@Select[Mod[ #, 9]& /@ Partitions[n], (Length@# != Length@Union@#)&]; lst = Array[np, 50]
CROSSREFS
KEYWORD
nonn
AUTHOR
Giovanni Resta, Feb 06 2006
EXTENSIONS
a(0)=1 prepended by Alois P. Heinz, Jan 23 2021
STATUS
approved