Record holders for lengths of ever-decreasing aliquot sequences.

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =14a(5) =16a(6) =26a(7) =46a(8) =52a(9) =166a(10) =212a(11) =1113a(12) =2343a(13) =4437a(14) =5145a(15) =8535a(16) =10665a(17) =18711a(18) =33682a(19) =64935a(20) =114808a(21) =187232a(22) =228316a(23) =304412a(24) =464132a(25) =556636a(26) =623288a(27) =1230284a(28) =1319956a(29) =1508504