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 A021444 #28 Aug 14 2025 15:44:55
%S A021444 0,0,2,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,
%T A021444 7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,
%U A021444 7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7,2,7
%N A021444 Decimal expansion of 1/440.
%H A021444 Antti Karttunen, <a href="/A021444/b021444.txt">Table of n, a(n) for n = 0..1001</a>
%H A021444 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (0,1).
%e A021444 0.002272727272727272727272727272727272727272727272727...
%t A021444 First[RealDigits[1/440, 10, 100, -1]] (* or *)
%t A021444 PadRight[{0, 0, 2}, 100, {7, 2}] (* _Paolo Xausa_, Aug 14 2025 *)
%o A021444 (PARI) 1/440. \\ _Charles R Greathouse IV_, Jul 13 2016
%o A021444 (Scheme) (define (A021444 n) (cond ((<= n 1) 0) ((= 2 n) n) ((even? n) 7) (else 2))) ;; _Antti Karttunen_, Sep 14 2017
%Y A021444 Cf. A010697.
%K A021444 nonn,cons,easy
%O A021444 0,3
%A A021444 _N. J. A. Sloane_