Clique number of commuting graph of symmetric group S_n.

Terms

a(0) =0a(1) =0a(2) =0a(3) =2a(4) =3a(5) =5a(6) =8a(7) =11a(8) =17a(9) =26a(10) =35a(11) =53a(12) =80a(13) =107a(14) =161a(15) =242a(16) =323a(17) =485a(18) =728a(19) =971a(20) =1457a(21) =2186a(22) =2915a(23) =4373a(24) =6560a(25) =8747a(26) =13121a(27) =19682a(28) =26243a(29) =39365