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%I #17 Jan 24 2024 07:56:01
%S 3,5,5,7,9,11,13,13,15,17,19,21,25,27,53,81,85,183,191,307,377,409,
%T 475,541,565,885,1065,1399,1489,2653,4523,4565,5773,7777,14281
%N Number of decimal digits in the increasing sequence of primes obtainable by concatenating successive decrements from some power of 10.
%e 1000999998997 is one of the primes described and provides a value of 13 in this sequence, with 1000000999999 providing the other (A227949(7) and A227949(8), in opposite order for the purposes of the FORMULA at that sequence (technically)).
%Y Cf. A227949, A227951.
%K nonn,base,more
%O 1,1
%A _James G. Merickel_, Aug 22 2013
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