Phi(n) values in A115921.

Terms

a(0) =1a(1) =12a(2) =36a(3) =192a(4) =250a(5) =1258a(6) =1872a(7) =1992a(8) =3544a(9) =2952a(10) =3576a(11) =3756a(12) =2016a(13) =1764a(14) =4356a(15) =2268a(16) =2376a(17) =2472a(18) =2280a(19) =5184a(20) =2988a(21) =11736a(22) =11832a(23) =12168a(24) =13200a(25) =10258a(26) =20176a(27) =10528a(28) =21472a(29) =15228