Sum of totients of binomial coefficients C(n,j), j=0..n.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =8a(5) =18a(6) =30a(7) =86a(8) =106a(9) =158a(10) =290a(11) =662a(12) =1410a(13) =3674a(14) =7166a(15) =16242a(16) =20242a(17) =46754a(18) =72910a(19) =162686a(20) =304866a(21) =524570a(22) =1179430a(23) =2842710a(24) =5230210a(25) =11035402a(26) =24478394a(27) =40473686a(28) =63927602a(29) =155016682