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 A059582 #23 Jul 02 2025 16:02:00
%S A059582 1,4,5,9,10,15,24,26,32,37,40,45,53,62,69,78,81,83,86,94,98,104,106,
%T A059582 112,116,119,122,130,133,135,142,151,156,156,158,166,174,178,179,188,
%U A059582 195,196,202,211,214,223,232,235,242,247,248,248,253,261,263,263,272
%N A059582 First differences give digits of Pi = 3.1415926...
%C A059582 A more natural variant is given by A046974, the partial sums of the digits of Pi (A000796). Maybe the present version is motivated by the coincidence that the first four digits 1,4,5,9 are similar to the decimals .14159 of Pi. - _M. F. Hasler_, Jan 19 2015
%H A059582 Harry J. Smith, <a href="/A059582/b059582.txt">Table of n, a(n) for n = 0..2000</a>
%H A059582 A. Frank & P. Jacqueroux, <a href="http://www.paulcooijmans.com/others/intcontest.pdf">International Contest</a>, 2001. Item 14
%p A059582 Digits := 200: it := evalf(Pi, 200)/10: out := 1: for i from 1 to 200 do printf(`%d,`,out): out := out+floor(10*it): it := 10*it-floor(10*it): od:
%t A059582 Accumulate[Join[{1},RealDigits[Pi,10,60][[1]]]] (* _Harvey P. Dale_, Jan 18 2015 *)
%o A059582 (PARI) { default(realprecision, 2080); a=1; x=Pi/10; for (n=0, 2000, d=floor(x); x=(x-d)*10; write("b059582.txt", n, " ", a+=d)); } \\ _Harry J. Smith_, Jun 28 2009
%Y A059582 Cf. A253906, A253907.
%K A059582 nonn,base,easy
%O A059582 0,2
%A A059582 _Rodolfo Kurchan_, Feb 17 2001
%E A059582 More terms from _James Sellers_, Feb 19 2001