Number of (2k+1)-ary quasitrivial semigroups on an n-element set.

A308362

Number of (2k+1)-ary quasitrivial semigroups on an n-element set.

Terms

    a(0) =1a(1) =5a(2) =23a(3) =162a(4) =1382a(5) =14236a(6) =170872a(7) =2344530a(8) =36188534a(9) =620652000a(10) =11708927276a(11) =240976560622

External references