Numerators of average numbers of trees in a forest on n nodes.

Terms

a(0) =1a(1) =3a(2) =2a(3) =13a(4) =12a(5) =49a(6) =93a(7) =5a(8) =127a(9) =803a(10) =1703a(11) =3755a(12) =271a(13) =19338a(14) =45275a(15) =108229a(16) =262604a(17) =647083a(18) =1613941a(19) =2036099a(20) =576341a(21) =13331695a(22) =264583a(23) =90049334a(24) =236302157a(25) =38973748a(26) =330784573a(27) =8814122981a(28) =7861906901a(29) =63359160443