Related to label-increasing forests with branching bounded by 4.

A297203

Related to label-increasing forests with branching bounded by 4.

Terms

    a(0) =1a(1) =4a(2) =16a(3) =68a(4) =324a(5) =1776a(6) =11204a(7) =80512a(8) =651076a(9) =5859204a(10) =58117016a(11) =630181168a(12) =7417888504a(13) =94216151156

External references