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 A059932 #6 Dec 15 2017 17:34:54 %S A059932 23,5711,1317192329,31374143475359,6167717379838997101103107, %T A059932 109113127131137139149151157163167173179, %U A059932 181191193197199211223227229233239241251257263269271 %N A059932 Prime groupings. %C A059932 a(n) is formed by concatenating the next prime(n) primes. %F A059932 The n-th term of the sequence is determined by grouping the prime numbers according to the natural order of primes themselves, e.g. the first prime is 2 so group the first two primes 2 and 3. Second prime is 3 so group the next 3 primes 5, 7 and 11, etc. %K A059932 easy,nonn,base %O A059932 0,1 %A A059932 _Jason Earls_, Mar 01 2001