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 A146099 #18 Jun 20 2025 12:43:58 %S A146099 1,1,2,5,6,7,5,4,0,6,1,6,4,1,7,5,5,0,4,5,1,6,6,1,6,4,1,1,5,2,6,4,5,4, %T A146099 6,3,1,6,1,1,1,2,5,6,7,5,4,0,6,1,6,4,1,7,5,5,0,4,5,1,6,6,1,6,4,1,1,5, %U A146099 2,6,4,5,4,6,3,1,6,1,1,1,2,5,6,7,5,4,0,6,1,6,4,1,7,5,5,0,4,5,1,6,6,1,6,4,1 %N A146099 Bell numbers (A000110) read mod 9. %H A146099 G. C. Greubel, <a href="/A146099/b146099.txt">Table of n, a(n) for n = 0..10000</a> %H A146099 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 A146099 <a href="/index/Rec#order_39">Index entries for linear recurrences with constant coefficients</a>, signature (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1). %F A146099 a(n+39) = a(n). - _G. C. Greubel_, Jan 31 2016 [See A054767. - _Jianing Song_, Jun 20 2025] %t A146099 Mod[BellB[Range[0, 100]], 9] (* _G. C. Greubel_, Jan 31 2016 *) %o A146099 (Magma) [Bell(n) mod 9: n in [0..100]]; // _Vincenzo Librandi_, Feb 01 2016 %Y A146099 Cf. A000110, A146093-A146122 (Bell numbers read mod 3 to mod 32). %Y A146099 Cf. A054767 (periods). %K A146099 nonn %O A146099 0,3 %A A146099 _N. J. A. Sloane_, Feb 07 2009