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 A138822 #20 Sep 08 2022 08:45:33
%S A138822 21,31,52,73,115,138,1713,1921,2334,2955,3189,37144,41233,43377,47610,
%T A138822 53987,591597,612584,674181,716765,7310946,7917711,8328657,8946368,
%U A138822 9775025,101121393,103196418,107317811,109514229,113832040,1271346269
%N A138822 Concatenation of n-th prime and n-th Fibonacci number.
%H A138822 Harvey P. Dale, <a href="/A138822/b138822.txt">Table of n, a(n) for n = 1..1000</a>
%e A138822 a(10)=2955 because A000040(10)=29 and A000045(10)=55.
%t A138822 With[{nn=50},FromDigits[Flatten[IntegerDigits[#]]]&/@Thread[ {Prime[ Range[ nn]],Fibonacci[Range[nn]]}]] (* _Harvey P. Dale_, Jul 12 2014 *)
%o A138822 (Magma) [Seqint(Intseq(Fibonacci(n)) cat Intseq(NthPrime(n))): n in [1..50]]; // _Vincenzo Librandi_, Jul 24 2019
%Y A138822 Cf. A000040, A000045, A045532, A075110, A138821.
%K A138822 base,easy,nonn
%O A138822 1,1
%A A138822 _Omar E. Pol_, Apr 05 2008