Phi(m)*sigma(m), where m is the product of exactly two primes that differ by 2, where phi=A000010, sigma=A000203.
A094949
Phi(m)*sigma(m), where m is the product of exactly two primes that differ by 2, where phi=A000010, sigma=A000203.
Terms
- a(0) =192a(1) =1152a(2) =20160a(3) =103680a(4) =806400a(5) =3104640a(6) =12945600a(7) =26853120a(8) =108201600a(9) =136002240a(10) =362597760a(11) =506160000a(12) =1049630400a(13) =1358807040a(14) =1536796800a(15) =2702128320a(16) =3317529600a(17) =5314118400a(18) =6323748480a(19) =9475464960a(20) =14665694400
External references
- oeis: A094949