Number of binary rooted trees of height n requiring 3 registers.

A006223

Number of binary rooted trees of height n requiring 3 registers.

Terms

    a(0) =1a(1) =14a(2) =118a(3) =780a(4) =4466a(5) =23276a(6) =113620a(7) =528840a(8) =2375100a(9) =10378056a(10) =44381832a(11) =186574864a(12) =773564328a(13) =3171317360a(14) =12880883408a(15) =51915526432a(16) =207893871472a(17) =827983736608

External references