Number of 3's in n-th term of A022482.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =1a(7) =1a(8) =2a(9) =5a(10) =6a(11) =9a(12) =12a(13) =16a(14) =22a(15) =27a(16) =37a(17) =47a(18) =60a(19) =81a(20) =108a(21) =143a(22) =190a(23) =266a(24) =352a(25) =463a(26) =613a(27) =812a(28) =1086a(29) =1419