Partitions with parts repeated at most twice and repetition only allowed if first part has an even index (first index = 1).
A227135
Partitions with parts repeated at most twice and repetition only allowed if first part has an even index (first index = 1).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =4a(6) =4a(7) =6a(8) =8a(9) =10a(10) =12a(11) =17a(12) =20a(13) =25a(14) =31a(15) =39a(16) =47a(17) =58a(18) =69a(19) =85a(20) =102a(21) =123a(22) =145a(23) =175a(24) =207a(25) =246a(26) =290a(27) =343a(28) =401a(29) =473
External references
- oeis: A227135