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 A322776 #13 Jan 04 2019 10:54:10 %S A322776 1,14,4,141,41,1415,415,15,5,14159,4159,159,59,9,141592,41592,1592, %T A322776 592,92,2,1415926,415926,15926,5926,926,26,6,14159265,4159265,159265, %U A322776 59265,9265,265,65,141592653,41592653,1592653,592653,92653,2653,653,53,3,1415926535 %N A322776 Scan first k digits of Pi after decimal point, for k = 1,2,3,..., record all distinct numbers in the order in which they appear. %C A322776 Skip any "numbers" that begin with 0, except 0 itself. %C A322776 Presumably this is a permutation of the nonnegative numbers. %C A322776 All the terms of A039916 appear in order in this sequence. - _Rémy Sigrist_, Jan 03 2019 %H A322776 Rémy Sigrist, <a href="/A322776/b322776.txt">Table of n, a(n) for n = 1..10000</a> %o A322776 (PARI) pid=Pi-3; s=Set(); for (k=1, 9, pid*=10; my (f=floor(pid)); forstep (w=k, 1, -1, v=f % (10^w); if (!setsearch(s, v), print1 (v ", %o A322776 "); s=setunion(s,Set(v))))) \\ _Rémy Sigrist_, Jan 03 2019 %Y A322776 Inspired by A323036. %Y A322776 Cf. A039916, A322777, A154883. %K A322776 nonn,base %O A322776 1,2 %A A322776 _N. J. A. Sloane_, Jan 03 2019 %E A322776 More terms from _Rémy Sigrist_, Jan 03 2019