Least prime p such that sigma(x)=sigma(p) has exactly n solutions.

Terms

a(0) =2a(1) =11a(2) =23a(3) =179a(4) =71a(5) =167a(6) =239a(7) =431a(8) =359a(9) =503a(10) =3167a(11) =1511a(12) =4679a(13) =2687a(14) =719a(15) =9719a(16) =4799a(17) =16319a(18) =5471a(19) =10559a(20) =1439a(21) =26399a(22) =24623a(23) =3359a(24) =15359a(25) =3023a(26) =7559a(27) =6719a(28) =2879a(29) =26783