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 A114804 #11 Jul 04 2021 15:49:03 %S A114804 282,680,242,728,218,665,601,968,259,48,177,146,531,440,159,432,247, %T A114804 829,681,434,890,643,46,720,129,140,162,387,420,488,116,226,146,634, %U A114804 867,844,1,46,35,320,231,381,59,608,941,431,788,262,824,295,364,808 %N A114804 The numbers 3^n-1 written in groups of three digits, with leading zeros omitted. %H A114804 Harvey P. Dale, <a href="/A114804/b114804.txt">Table of n, a(n) for n = 1..10000</a> %e A114804 2, 8, 26, 80, 242, 728, 2186, ... %t A114804 FromDigits/@Partition[Flatten[IntegerDigits/@(3^Range[30]-1)],3] (* _Harvey P. Dale_, Jul 04 2021 *) %Y A114804 Cf. A024023, A114645, A114807, A114808. %K A114804 base,dumb,nonn %O A114804 1,1 %A A114804 _Jonathan Vos Post_, Feb 18 2006 %E A114804 Terms recomputed to use the definition equivalent to A114645. - _R. J. Mathar_, Jun 23 2014