1,1
P. De Geest, WONplate 122
C. Rivera, Puzzle 46
5 can be represented (in just one way) as 2+3.
Cf. A050936, A067372-A067380.
Sequence in context: A155455 A198688 A202249 * A155612 A145215 A083884
Adjacent sequences: A067378 A067379 A067380 * A067382 A067383 A067384
nonn,hard,more
Patrick De Geest (pdg(AT)worldofnumbers.com), Feb 04 2002.