Online Algebra Calculator
Many of users do not use powerful Maxima computer algebra system for systematic work, but for ad hoc algebraic calculations – equations, functions, matrixes, etc. only. To do this job, it is not useful to download the whole application from a web site.
Function: euler (<n>) Returns the <n>th Euler number for nonnegative integer <n>.

For the Euler-Mascheroni constant, see %gamma.
(%i1) map (euler, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
(%o1) [1, 0, - 1, 0, 5, 0, - 61, 0, 1385, 0, - 50521] There are also some inexact matches for euler. Try ?? euler to see them.
(%o1) true (%i2)