Define k(0) = 2 and k(m) = m^2-k(m-1) for m >= 1. This is a list of those terms k(m) for which k(m)+1 and k(m)-1 are both in A008578 (primes including 1).
A154734
Define k(0) = 2 and k(m) = m^2-k(m-1) for m >= 1. This is a list of those terms k(m) for which k(m)+1 and k(m)-1 are both in A008578 (primes including 1).
Terms
- a(0) =2a(1) =4a(2) =12a(3) =138a(4) =822a(5) =2082a(6) =3918a(7) =21738a(8) =39342a(9) =62130a(10) =70878a(11) =106032a(12) =117372a(13) =129288a(14) =135462a(15) =182712a(16) =512580a(17) =524802a(18) =575130a(19) =682698a(20) =769422a(21) =799482a(22) =893118a(23) =1008912a(24) =1026030a(25) =1043292a(26) =1828830a(27) =2368578a(28) =2447580a(29) =3247428
External references
- oeis: A154734