Least positive integer k such that both k and k*n belong to the set {m>0: prime(m) = prime(p)+2 for some prime p}.
A261295
Least positive integer k such that both k and k*n belong to the set {m>0: prime(m) = prime(p)+2 for some prime p}.
Terms
- a(0) =3a(1) =3a(2) =6a(3) =578a(4) =18a(5) =3a(6) =6a(7) =90a(8) =1868a(9) =374a(10) =4a(11) =674a(12) =278a(13) =3a(14) =6a(15) =114a(16) =3534a(17) =110a(18) =6a(19) =354a(20) =4a(21) =14a(22) =28464a(23) =2790a(24) =84a(25) =4452a(26) =2802a(27) =3a(28) =6a(29) =3
External references
- oeis: A261295