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 A047688 #20 Jun 08 2025 04:59:02 %S A047688 1,1,2,1,8,15,240,90,5760,5670,3628800,3150,14515200,48648600, %T A047688 4151347200,2554051500,20922789888000,43418875500,6402373705728000, %U A047688 34735100400,3283268567040000,623668727682000,34060628114472960000,306265893058125 %N A047688 Denominators of coefficients in Taylor series for exp(sin(x)). %D A047688 CRC Standard Mathematical Tables and Formulae, 30th ed. 1996, p. 42. %H A047688 M. F. Hasler, <a href="/A047688/b047688.txt">Table of n, a(n) for n = 0..500</a>, Jun 07 2025 %e A047688 1 + 1*x + (1/2)*x^2 - (1/8)*x^4 - (1/15)*x^5 - (1/240)*x^6 + (1/90)*x^7 + (31/5760)*x^8 + ... %o A047688 (PARI) apply(denominator, Vec(exp(sin(x)))) \\ _M. F. Hasler_, Jun 07 2025 %Y A047688 Cf. A047687 (numerators), A002017 (e.g.f. of exp(sin(x))). %K A047688 nonn,frac %O A047688 0,3 %A A047688 _N. J. A. Sloane_