Number of nonisomorphic cyclic subgroups of alternating group A_n (or number of distinct orders of even permutations of n objects); number of different LCM's of partitions of n which have even number of even parts.
A020902
Number of nonisomorphic cyclic subgroups of alternating group A_n (or number of distinct orders of even permutations of n objects); number of different LCM's of partitions of n which have even number of even parts.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =4a(6) =5a(7) =7a(8) =8a(9) =11a(10) =13a(11) =16a(12) =18a(13) =22a(14) =26a(15) =30a(16) =35a(17) =39a(18) =46a(19) =51a(20) =60a(21) =67a(22) =76a(23) =84a(24) =94a(25) =105a(26) =119a(27) =133a(28) =147a(29) =162
External references
- oeis: A020902