Pentagonal numbers penta(n) = (p + q + r)/3 which are the arithmetic mean of three consecutive primes such that p < penta(n) < q < r.
A234532
Pentagonal numbers penta(n) = (p + q + r)/3 which are the arithmetic mean of three consecutive primes such that p < penta(n) < q < r.
Terms
- a(0) =9087a(1) =29751a(2) =291501a(3) =602617a(4) =1505505a(5) =1778337a(6) =1941997a(7) =2137857a(8) =3032415a(9) =4629695a(10) =5016947a(11) =5038917a(12) =7837551a(13) =8030737a(14) =9328807a(15) =11935651a(16) =19158427a(17) =35616757a(18) =40964001a(19) =41073817a(20) =42594697a(21) =44289817a(22) =56141827a(23) =59267551
External references
- oeis: A234532