Number of maximal collections of pairwise disjoint subsets {X,Y,Z} of {1, 2, ..., n}, each satisfying X + Y = Z.
A002849
Number of maximal collections of pairwise disjoint subsets {X,Y,Z} of {1, 2, ..., n}, each satisfying X + Y = Z.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =6a(6) =3a(7) =10a(8) =25a(9) =12a(10) =42a(11) =8a(12) =40a(13) =204a(14) =21a(15) =135a(16) =1002a(17) =4228a(18) =720a(19) =5134a(20) =29546a(21) =4079a(22) =35533a(23) =3040a(24) =28777a(25) =281504a(26) =20505a(27) =212283a(28) =2352469a(29) =16907265
External references
- oeis: A002849