Let A087788(n) = p*q*r, where p<q<r, be the n-th 3-Carmichael number. Then a(n) = (p-1)*(p*q*r-1)/((q-1)*(r-1)).

A162290

Let A087788(n) = p*q*r, where p<q<r, be the n-th 3-Carmichael number. Then a(n) = (p-1)*(p*q*r-1)/((q-1)*(r-1)).

Terms

    a(0) =7a(1) =23a(2) =48a(3) =22a(4) =47a(5) =45a(6) =45a(7) =21a(8) =44a(9) =163a(10) =162a(11) =43a(12) =161a(13) =280a(14) =1684a(15) =1363a(16) =159a(17) =351a(18) =950a(19) =1675a(20) =1358a(21) =949a(22) =158a(23) =345a(24) =1829a(25) =947a(26) =1353a(27) =510a(28) =938a(29) =1660

External references