%I #9 Sep 23 2024 13:46:20
%S 4,4,8,10,17,24,46,94,139,241,416,688,1170,1969,3345,5674,9527,16316,
%T 27464,46668,78897,134097,226457,381906,645210,1093472,1843869,
%U 3127129,5278196
%N Number of n-digit primes in A104179.
%e a(3) = 8 because there are eight 3-digit primes {223, 233, 337, 353, 373, 523, 733, 773} that are concatenations of a 1-digit prime and a 2-digit prime that is itself a concatenation of 1-digit primes.
%Y Cf. A104179, A376434, A376435.
%K nonn,base,more
%O 1,1
%A _Karl W. Heuer_, Sep 22 2024