Number of compositions (ordered partitions) of n into parts with an even number of prime divisors (counted with multiplicity).
A286227
Number of compositions (ordered partitions) of n into parts with an even number of prime divisors (counted with multiplicity).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =5a(7) =7a(8) =10a(9) =15a(10) =24a(11) =36a(12) =53a(13) =78a(14) =118a(15) =179a(16) =271a(17) =405a(18) =605a(19) =907a(20) =1366a(21) =2055a(22) =3086a(23) =4628a(24) =6948a(25) =10440a(26) =15689a(27) =23560a(28) =35371a(29) =53110
External references
- oeis: A286227