Number of symmetric and correlation-immune Boolean functions of n variables.

Terms

a(0) =6a(1) =8a(2) =10a(3) =20a(4) =26a(5) =48a(6) =42a(7) =64a(8) =66a(9) =144a(10) =178a(11) =452a(12) =428a(13) =576a(14) =514a(15) =1072a(16) =1442a(17) =2864a(18) =2534a(19) =4608a(20) =6402a(21) =12448a(22) =9350a(23) =16648a(24) =16522a(25) =32768a(26) =36866a(27) =82496a(28) =77186a(29) =132352