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 A155894 #10 Mar 05 2024 02:44:59
%S A155894 1,2,10,36,9,3,5,24,8,43,82,25,30,46,64,62,60,68,7,14,70,18,13,4,31,
%T A155894 272,19,12,97,35,161,140,20,86,27,74,131,11,502,234,47,181,386,21,6,
%U A155894 996,52,232,144,32,393,189,199,281,10,490,39,154,83,22,28,577,63,65,88,61,115
%N A155894 Least positive integer such that a(n)! starts with n, both written in base 16.
%H A155894 Nick Hobson, <a href="/A155894/b155894.txt">Table of n, a(n) for n = 1..4095</a>
%H A155894 Nick Hobson, <a href="/A155894/a155894.c.txt">C program</a>.
%o A155894 (PARI) A155894(n)={ local( F=1,k=1 ); while( F\1!=n, F*=k++; while( F>=n+1, F/=16 )); k}
%o A155894 (C) See Links section.
%Y A155894 Cf. A155891, A155892, A155893, A018799, A076219.
%K A155894 base,nonn
%O A155894 1,2
%A A155894 _M. F. Hasler_, Feb 01 2009