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 A265084 #13 Aug 10 2025 02:48:31
%S A265084 0,4,20,108,544,2540,11544,52192,231872,1014444,4401400,19016888,
%T A265084 81588720,347833408,1476460496,6250982640,26366866432,110825294252,
%U A265084 464575219704,1944165731800,8117172816560,33813868882584,140605002878032,583960731640688,2421457649730528,10025040350809600
%N A265084 Column 4 of array in A265080.
%H A265084 Andrew Howroyd, <a href="/A265084/b265084.txt">Table of n, a(n) for n = 0..500</a>
%H A265084 D. R. L. Brown, <a href="https://ia.cr/2015/375">Bounds on surmising remixed keys</a>, IACR, Report 2015/375, 2015-2016. See Table 1.
%F A265084 E.g.f.: Sum_{j>=0} (exp(x)^4 - (Sum_{i=0..j} x^i/i!)^4). - _Andrew Howroyd_, Aug 09 2025
%o A265084 (PARI) seq(n)={Vec(serlaplace(sum(j=0, n, exp(4*x + O(x*x^n)) - sum(i=0, j, x^i/i!, O(x*x^n))^4)), -n-1)} \\ _Andrew Howroyd_, Aug 09 2025
%Y A265084 Cf. A265080.
%K A265084 nonn
%O A265084 0,2
%A A265084 _N. J. A. Sloane_, Jan 01 2016
%E A265084 a(6) onwards from _Andrew Howroyd_, Aug 09 2025