%I
%S 1,3,7,26,128,733,3869,23620,152141,1028789,7188960,51672312,
%T 381226246,2873279651
%N Number of ndigit prime quadruplets.
%H J.L. Baril, <a href="http://www.combinatorics.org/ojs/index.php/eljc/article/view/v18i1p178">Classical sequences revisited with permutations avoiding dotted pattern</a>, Electronic Journal of Combinatorics, 18 (2011), #P178.
%H T. R. Nicely, <a href="https://faculty.lynchburg.edu/~nicely/quads/quads.html">Enumeration to 1.6*10^15 of the prime quadruplets</a>.
%e a(3) = 3 because there are three threedigit prime quadruples: {101, 103, 107, 109}, {191, 193, 197, 199} and {821, 823, 827, 829}.
%Y Cf. A006879, A070076, A038801.
%K nonn,more,base
%O 2,2
%A Julien Peter Benney (jpbenney(AT)ftml.net), Aug 15 2006, Aug 19 2006
%E a(6) corrected and a(15) supplied by _Jon E. Schoenfield_, Aug 27 2006
