f-amicable numbers where f(n) = n-1.

Terms

a(0) =100a(1) =110a(2) =1806a(3) =1872a(4) =2404a(5) =3742a(6) =12488a(7) =14378a(8) =25130a(9) =26696a(10) =53418a(11) =57448a(12) =61962a(13) =64938a(14) =67528a(15) =67624a(16) =172362a(17) =187624a(18) =195114a(19) =208072a(20) =591882a(21) =643624a(22) =790758a(23) =938948a(24) =1361562a(25) =1381624a(26) =1803776a(27) =1877682a(28) =1892224a(29) =2091770