Total number of left-to-right minima in all compositions of n.

Terms

a(0) =0a(1) =1a(2) =2a(3) =5a(4) =10a(5) =22a(6) =45a(7) =93a(8) =190a(9) =387a(10) =783a(11) =1583a(12) =3191a(13) =6422a(14) =12907a(15) =25916a(16) =51993a(17) =104245a(18) =208902a(19) =418466a(20) =837994a(21) =1677694a(22) =3358127a(23) =6720661a(24) =13448413a(25) =26908246a(26) =53834890a(27) =107699435a(28) =215446685a(29) =430970500