|
%I #14 May 03 2017 21:54:32
%S 7,89,569,5689,34679,345689,1456789,23456789
%N Largest n-digit prime with strictly increasing digits.
%C Notice the terms with consecutive digits; search for 23456789 to find several related sequences including A006055, A052017 and A052077.
%e a(1) = A052015(4), a(2) = A052015(15), a(3) = A052015(35), a(4) = A052015(61), ... In short, a(n) = A052015(b(n)) with b = (4, 15, 35, 61, 81, 94, 98, 100). - _M. F. Hasler_, May 03 2017
%o (PARI) A071363(n,u=vectorv(n,i,10^(n-i)))={forvec(d=vector(n,i,[1,9]),isprime(d*u)&&n=d*u,2);n} \\ _M. F. Hasler_, May 03 2017
%Y Cf. A071362, A071360, A071361, A007810.
%Y Subsequence of A052015.
%K base,fini,full,nonn
%O 1,1
%A _Rick L. Shepherd_, May 21 2002
|
