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 A115417 #10 Dec 30 2024 13:17:22 %S A115417 7,14,21,28,4,11,18,25,4,11,18,25,1,8,15,22,29,6,13,20,27,3,10,17,24, %T A115417 1,8,15,22,29,5,12,19,26,2,9,16,23,30,7,14,21,28,4,11,18,25,2,9,16,23, %U A115417 30,6,13,20,27,3,10,17,24,3,10,17,24,31,7,14,21,28,5 %N A115417 Dates of Sundays starting from Jan 01 2001. %H A115417 Robert Israel, <a href="/A115417/b115417.txt">Table of n, a(n) for n = 1..10000</a> %p A115417 # this requires Maple 2018 or later %p A115417 with(Calendar): %p A115417 d:= Date(2001,1,7): %p A115417 R:=7: %p A115417 for i from 2 to 100 do %p A115417 d:= AdjustDateField(d,"date",7); %p A115417 R:= R, DayOfMonth(d); %p A115417 od: %p A115417 R; # _Robert Israel_, Dec 30 2024 %t A115417 NestList[DatePlus[#,7]&,{2001,1,7},100][[All,3]] (* _Harvey P. Dale_, May 09 2021 *) %Y A115417 Cf. A001356, A051121. %K A115417 nonn %O A115417 1,1 %A A115417 Jose A. Ruperez (josea(AT)ruperez.com), Mar 08 2006 %E A115417 Corrected by _Harvey P. Dale_, May 09 2021