Number of n-node steric rooted ternary trees; number of n carbon alkyl radicals C(n)H(2n+1) taking stereoisomers into account.

A000625

Number of n-node steric rooted ternary trees; number of n carbon alkyl radicals C(n)H(2n+1) taking stereoisomers into account.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =11a(6) =28a(7) =74a(8) =199a(9) =551a(10) =1553a(11) =4436a(12) =12832a(13) =37496a(14) =110500a(15) =328092a(16) =980491a(17) =2946889a(18) =8901891a(19) =27012286a(20) =82300275a(21) =251670563a(22) =772160922a(23) =2376294040a(24) =7333282754a(25) =22688455980a(26) =70361242924a(27) =218679264772a(28) =681018679604

External references