Number of partitions of n having no doubletons. By a doubleton in a partition we mean an occurrence of a part exactly twice (the partition [4,(3,3),2,2,2,(1,1)] of 18 has two doubletons, shown between parentheses).
A116645
Number of partitions of n having no doubletons. By a doubleton in a partition we mean an occurrence of a part exactly twice (the partition [4,(3,3),2,2,2,(1,1)] of 18 has two doubletons, shown between parentheses).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =5a(6) =8a(7) =10a(8) =13a(9) =20a(10) =26a(11) =33a(12) =46a(13) =58a(14) =75a(15) =101a(16) =125a(17) =157a(18) =206a(19) =253a(20) =317a(21) =403a(22) =494a(23) =608a(24) =760a(25) =926a(26) =1131a(27) =1393a(28) =1685a(29) =2038
External references
- oeis: A116645