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 A019515 #23 Feb 16 2025 08:32:33 %S A019515 2,2,3,13,289,34561,24883201,125411328001,5056584744960001, %T A019515 1834933472251084800001,6658606584104736522240000001, %U A019515 265790267296391946810949632000000001 %N A019515 a(n) = 1 + 0!*1!*2!*...*n!. %D A019515 M. Le, On the Interesting Smarandache Product Sequences, Smarandache Notions Journal, Vol. 9, No. 1-2, 1998, 133-134. %D A019515 F. Iacobescu, Smarandache Partition Type and Other Sequences, Bull. Pure Appl. Sciences, Vol. 16E, No. 2 (1997), pp. 237-240. %H A019515 G. C. Greubel, <a href="/A019515/b019515.txt">Table of n, a(n) for n = 0..40</a> %H A019515 F. Smarandache, <a href="http://www.gallup.unm.edu/~smarandache/CP2.pdf">Collected Papers, Vol. II</a>, Vol. II, Tempus Publ. Hse., Bucharest, Romania, 1996. %H A019515 F. Smarandache, <a href="http://www.gallup.unm.edu/~smarandache/Sequences-book.pdf">Sequences of Numbers Involved in Unsolved Problems</a>. %H A019515 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SmarandacheSequences.html">Smarandache Sequences</a> %F A019515 a(n) = A000178(n) + 1. %t A019515 FoldList[Times,1,Range[12]!]+1 (* _Harvey P. Dale_, Dec 11 2012 *) %Y A019515 Cf. A000178. %K A019515 nonn,easy %O A019515 0,1 %A A019515 R. Muller %E A019515 Name corrected by _Arkadiusz Wesolowski_, Oct 03 2011