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 A126840 #12 Jan 06 2025 04:06:03 %S A126840 1,97,10,101,111,2,75,22,97,119,34,42,37,15,21,18,20,92,110,79,24,31, %T A126840 76,99,73,80,93,73,99,101,73,8,98,4,97,117,102,22,7,22,113,29,27,46, %U A126840 119,112,85,59,19,63,79,107,5,67,23,77,11,44,82,64,23,63,15,91,114,68,59,84,34 %N A126840 Ramanujan numbers (A000594) read mod 11^2. %H A126840 Seiichi Manyama, <a href="/A126840/b126840.txt">Table of n, a(n) for n = 1..10000</a> %H A126840 H. P. F. Swinnerton-Dyer, <a href="http://dx.doi.org/10.1007/978-3-540-37802-0_1">On l-adic representations and congruences for coefficients of modular forms</a>, pp. 1-55 of Modular Functions of One Variable III (Antwerp 1972), Lect. Notes Math., 350, 1973. %t A126840 a[n_] := Mod[RamanujanTau[n], 121]; Array[a, 100] (* _Amiram Eldar_, Jan 05 2025 *) %o A126840 (PARI) a(n) = ramanujantau(n) % 121; \\ _Amiram Eldar_, Jan 05 2025 %Y A126840 Cf. A000594, A126839 (mod 11^1), this sequence (mod 11^2), A126841 (mod 11^3). %K A126840 nonn %O A126840 1,2 %A A126840 _N. J. A. Sloane_, Feb 25 2007