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 A045726 #14 Mar 21 2021 01:07:13 %S A045726 2,21,233,2584,28657,2178309,24157817,267914296,2971215073, %T A045726 20365011074,225851433717,2504730781961,27777890035288, %U A045726 2111485077978050,23416728348467685,259695496911122585,2880067194370816120 %N A045726 Fibonacci numbers having initial digit '2'. %H A045726 Michael De Vlieger, <a href="/A045726/b045726.txt">Table of n, a(n) for n = 1..845</a> %t A045726 Select[Array[Fibonacci, 90], First@ IntegerDigits[#] == 2 &] (* _Michael De Vlieger_, Mar 19 2021 *) %Y A045726 Intersection of A000045 and A217394. %K A045726 nonn,base %O A045726 1,1 %A A045726 _Jeff Burch_ %E A045726 a(12) corrected by _Sean A. Irvine_, Mar 19 2021