OFFSET
0,7
LINKS
Fausto A. C. Cariboni, Table of n, a(n) for n = 0..500
EXAMPLE
The a(2) = 1 through a(20) = 11 partitions (A..K = 10..20):
2 3 4 5 6 7 8 9 A B C D E F G H I J K
42 62 63 64 84 86 96 A6 863 A8 964 C8
82 93 A4 A5 C4 962 C6 A63 E6
A2 C2 C3 E2 E4 F5
642 842 862 F3 G4
A42 G2 I2
864 A64
963 A82
A62 C62
C42 E42
8642
MATHEMATICA
Table[Length[Select[IntegerPartitions[n], UnsameQ@@#&&!MatchQ[#, {___, x_, y_, ___}/; GCD[x, y]==1]&]], {n, 0, 30}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Gus Wiseman, Oct 14 2019
STATUS
approved