a(1) = 1; for n > 1, a(n) is the least k > a(n-1) such that a(n) + a(n-1) is square and a(n) - a(n-1) is prime.
A108972
a(1) = 1; for n > 1, a(n) is the least k > a(n-1) such that a(n) + a(n-1) is square and a(n) - a(n-1) is prime.
Terms
- a(0) =1a(1) =3a(2) =6a(3) =19a(4) =30a(5) =91a(6) =134a(7) =307a(8) =318a(9) =1051a(10) =1158a(11) =1867a(12) =2358a(13) =2971a(14) =3590a(15) =3979a(16) =4670a(17) =5131a(18) =5478a(19) =7747a(20) =7878a(21) =8251a(22) =8390a(23) =16891a(24) =17334a(25) =22267a(26) =28358a(27) =30691a(28) =31310a(29) =36811
External references
- oeis: A108972