|
%I #10 Jul 02 2024 07:18:42
%S 18,198,2006,19980,199994,1999986,20000010,199999996,1999999944,
%T 19999999986,199999999980,2000000000028,20000000000008,
%U 200000000000004,2000000000000026,19999999999999998,200000000000000000,1999999999999999992,20000000000000000012,200000000000000000028
%N a(n) = (largest prime < 10^n) + (smallest prime > 10^n).
%F a(n) = A003618(n) + A003617(n+1). - _Amiram Eldar_, Jul 02 2024
%t Table[NextPrime[10^n,-1]+NextPrime[10^n],{n,20}] (* _Harvey P. Dale_, May 03 2018 *)
%Y Cf. A003617, A003618.
%K nonn
%O 1,1
%A _Cino Hilliard_, Aug 27 2004
%E More terms from _Amiram Eldar_, Jul 02 2024
|
