Number of terms of A109858 with digit sum n.

Terms

a(0) =1a(1) =2a(2) =2a(3) =6a(4) =6a(5) =20a(6) =20a(7) =70a(8) =70a(9) =251a(10) =251a(11) =918a(12) =917a(13) =3404a(14) =3396a(15) =12750a(16) =12705a(17) =48125a(18) =47905a(19) =182735a(20) =181743a(21) =697193a(22) =692924a(23) =2670538a(24) =2652676a(25) =10263255a(26) =10189830a(27) =39554920a(28) =39256570a(29) =152819066