Amicable quadruples: the numbers c referred to in A036471.

Terms

a(0) =3461040a(1) =4150440a(2) =4918320a(3) =5475960a(4) =5920200a(5) =6421800a(6) =6768720a(7) =7559640a(8) =7280280a(9) =7685496a(10) =7227360a(11) =7688520a(12) =7715400a(13) =7840560a(14) =7948080a(15) =8125920a(16) =8873760a(17) =9098460a(18) =10063200a(19) =9830520a(20) =10260180a(21) =9661680a(22) =10521000a(23) =10188360a(24) =10914120a(25) =10747440a(26) =11241720