Sums of pairs of betrothed (or quasi-amicable) numbers.

Terms

a(0) =123a(1) =335a(2) =2975a(3) =3223a(4) =4319a(5) =11903a(6) =25479a(7) =30239a(8) =138239a(9) =393119a(10) =416639a(11) =508895a(12) =773759a(13) =861839a(14) =1071359a(15) =1391039a(16) =1645055a(17) =2903039a(18) =2413151a(19) =2298239a(20) =2903039a(21) =2515199a(22) =2557439a(23) =2757887a(24) =2695679a(25) =3856895a(26) =4147199a(27) =4717439a(28) =4245695a(29) =4561919