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 A146111 #14 Jun 20 2025 10:45:52 %S A146111 1,1,2,5,15,10,14,16,3,0,13,18,10,16,19,17,20,3,7,5,7,15,9,16,3,19,19, %T A146111 1,17,11,12,1,17,13,18,0,16,6,4,16,10,11,2,15,10,20,19,0,6,10,18,16,4, %U A146111 19,20,2,0,13,20,16,18,15,16,6,19,1,13,5,17,15,4,20,7,18,15,4,12,10,13,4,5 %N A146111 Bell numbers (A000110) read mod 21. %H A146111 G. C. Greubel, <a href="/A146111/b146111.txt">Table of n, a(n) for n = 0..10000</a> %H A146111 W. F. Lunnon, P. A. B. Pleasants, and N. M. Stephens, <a href="http://matwbn.icm.edu.pl/ksiazki/aa/aa35/aa3511.pdf">Arithmetic properties of Bell numbers to a composite modulus I</a>, Acta Arithmetica 35 (1979), pp. 1-16. %H A146111 <a href="/index/Rec#order_1784341">Index entries for linear recurrences with constant coefficients</a>, order 1784341. %F A146111 a(n+1784341) = a(n). - _G. C. Greubel_, Feb 02 2016 [See A054767. - _Jianing Song_, Jun 20 2025] %t A146111 Mod[BellB[Range[0,80]],21] (* _Harvey P. Dale_, Sep 04 2012 *) %Y A146111 Cf. A000110, A146093-A146122 (Bell numbers read mod 3 to mod 32). %Y A146111 Cf. A054767 (periods). %K A146111 nonn %O A146111 0,3 %A A146111 _N. J. A. Sloane_, Feb 07 2009