Number of 2's in n-th term of A022482.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =6a(6) =5a(7) =7a(8) =8a(9) =7a(10) =10a(11) =13a(12) =19a(13) =28a(14) =36a(15) =52a(16) =68a(17) =95a(18) =124a(19) =157a(20) =206a(21) =267a(22) =353a(23) =450a(24) =602a(25) =811a(26) =1088a(27) =1454a(28) =1922a(29) =2563