This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A376433 #9 Sep 23 2024 13:46:20
%S A376433 4,4,8,10,17,24,46,94,139,241,416,688,1170,1969,3345,5674,9527,16316,
%T A376433 27464,46668,78897,134097,226457,381906,645210,1093472,1843869,
%U A376433 3127129,5278196
%N A376433 Number of n-digit primes in A104179.
%e A376433 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 A376433 Cf. A104179, A376434, A376435.
%K A376433 nonn,base,more
%O A376433 1,1
%A A376433 _Karl W. Heuer_, Sep 22 2024