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 A126838 #12 Jan 06 2025 04:07:44 %S A126838 1,319,252,243,28,126,63,102,233,14,218,182,217,203,196,325,28,239, %T A126838 294,287,98,256,193,322,81,280,126,217,121,98,98,80,56,14,49,24,291, %U A126838 147,147,112,112,49,282,152,7,170,91,266,196,114,196,252,134,63,273,252,0,183,42 %N A126838 Ramanujan numbers (A000594) read mod 7^3. %H A126838 Seiichi Manyama, <a href="/A126838/b126838.txt">Table of n, a(n) for n = 1..10000</a> %H A126838 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 A126838 a[n_] := Mod[RamanujanTau[n], 343]; Array[a, 100] (* _Amiram Eldar_, Jan 05 2025 *) %o A126838 (PARI) a(n) = ramanujantau(n) % 343; \\ _Amiram Eldar_, Jan 05 2025 %Y A126838 Cf. A000594, A126836 (mod 7^1), A126837 (mod 7^2), this sequence (mod 7^3). %K A126838 nonn %O A126838 1,2 %A A126838 _N. J. A. Sloane_, Feb 25 2007