a(n) is the least Carmichael number of the form prime(n)*prime(n')*prime(n") with n < n' < n", or 0 if no such number exists.
A141705
a(n) is the least Carmichael number of the form prime(n)*prime(n')*prime(n") with n < n' < n", or 0 if no such number exists.
Terms
- a(0) =0a(1) =561a(2) =1105a(3) =1729a(4) =0a(5) =29341a(6) =162401a(7) =334153a(8) =1615681a(9) =3581761a(10) =399001a(11) =294409a(12) =252601a(13) =1152271a(14) =104569501a(15) =2508013a(16) =178837201a(17) =6189121a(18) =10267951a(19) =10024561a(20) =14469841a(21) =4461725581a(22) =985052881a(23) =19384289a(24) =23382529a(25) =3828001a(26) =90698401
External references
- oeis: A141705