Highest point reached in trajectory of n described in A098282, or -1 if no cycle is ever reached.

Terms

a(0) =1a(1) =2a(2) =3a(3) =11a(4) =5a(5) =131212367a(6) =11a(7) =1910112963a(8) =23a(9) =131212367a(10) =11a(11) =131212367a(12) =131212367a(13) =14a(14) =23a(15) =11126a(16) =17a(17) =222312455509a(18) =1910112963a(19) =1135a(20) =1112122a(21) =23a(22) =23a(23) =1112122a(24) =33a(25) =11126a(27) =222312455509a(28) =131212367a(29) =1135a(30) =31