Numbers k such that sopf(k) = sopfr(k+1), where sopf(k) = A008472(k) and sopfr(k) = A001414(k).

Terms

a(0) =5a(1) =15a(2) =77a(3) =99a(4) =104a(5) =153a(6) =369a(7) =492a(8) =539a(9) =714a(10) =1330a(11) =2491a(12) =4191a(13) =5405a(14) =5831a(15) =5959a(16) =6556a(17) =6579a(18) =6723a(19) =8463a(20) =9424a(21) =12221a(22) =12351a(23) =12726a(24) =13419a(25) =14587a(26) =21716a(27) =24432a(28) =24880a(29) =24895