Numbers n such that phi(n) = phi(n+11), with Euler's totient function phi = A000010.

Terms

a(0) =7a(1) =11a(2) =27a(3) =33a(4) =45a(5) =63a(6) =135a(7) =165a(8) =285a(9) =304a(10) =345a(11) =765a(12) =855a(13) =964a(14) =1144a(15) =1575a(16) =1744a(17) =2134a(18) =2295a(19) =2805a(20) =6424a(21) =6604a(22) =10725a(23) =23584a(24) =24244a(25) =27645a(26) =28875a(27) =31174a(28) =31354a(29) =35445