|
%I #10 Nov 08 2013 13:49:11
%S 1,29,269,689
%N Number of digits of the smallest prime with n consecutive ascending digits and most significant digit a five.
%C Digits are in ascending order beginning with 5 and after 9 comes 0.
%C The sequence "Primes with n consecutive digits descending beginning with the digit five" has only one term, 1 which represents the prime 5.
%e 29 is a term since the 29-digit number 56789012345678901234567890123 is a prime.
%t fQ[n_] := PrimeQ@ FromDigits@ Mod[4+Range@n, 10]; lst = {}; Do[ If[fQ@n, AppendTo[lst, n]; Print@n], {n, 9000}]; lst
%Y Cf. A006055, A120819, A120820, A120821, A120822, A120824, A120825, A120826, A120827.
%K base,hard,nonn
%O 1,2
%A _Robert G. Wilson v_, Jul 05 2006
|
