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 A256971 #10 Apr 21 2015 12:29:49
%S A256971 5,22,59,64,165,170,367,624,629,1030,1035,1612,2289,2294,2311,2316,
%T A256971 2329,3626,3631,5232,5237,5250,5279,5284,5325,5330,8247,11384,11389,
%U A256971 11402,11407,11424,15781,15786,15799,15804,21281,21334,21339,21376
%N A256971 Partial sums of A256970.
%D A256971 Richard Friedberg, An Adventurer's Guide to Number Theory, McGraw-Hill, NY, 1968.
%D A256971 Popular Computing (Calabasas, CA), Friedberg's Sequence, Vol. 5 (No. 46, Jan 1977), page PC46-2.
%H A256971 Reinhard Zumkeller, <a href="/A256971/b256971.txt">Table of n, a(n) for n = 1..10000</a>
%t A256971 Accumulate[Table[FactorInteger[4*n^2+1][[1,1]],{n,40}]] (* _Ivan N. Ianakiev_, Apr 20 2015 *)
%o A256971 (Haskell)
%o A256971 a256971 n = a256971_list !! (n-1)
%o A256971 a256971_list = scanl1 (+) a256970_list
%Y A256971 Cf. A053755, A256970.
%K A256971 nonn
%O A256971 1,1
%A A256971 _N. J. A. Sloane_, Apr 19 2015