Lower primes p1 in a twin pair such that sum of p1 and p2 yields average a1 of twin prime pairs and product of 2*a1 is another average of twin prime pairs.
A178421
Lower primes p1 in a twin pair such that sum of p1 and p2 yields average a1 of twin prime pairs and product of 2*a1 is another average of twin prime pairs.
Terms
- a(0) =211049a(1) =248639a(2) =253679a(3) =410339a(4) =507359a(5) =605639a(6) =1121189a(7) =1138829a(8) =1262099a(9) =2162579a(10) =2172869a(11) =2277659a(12) =4070219a(13) =6305459a(14) =7671509a(15) =11659409a(16) =12577109a(17) =14203769a(18) =14862119a(19) =17472839a(20) =18728639a(21) =18798359a(22) =20520569a(23) =21140699
External references
- oeis: A178421