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

Terms

a(0) =0a(1) =1a(2) =3a(3) =8a(4) =17a(5) =38a(6) =78a(7) =162a(8) =330a(9) =672a(10) =1355a(11) =2736a(12) =5503a(13) =11058a(14) =22191a(15) =44507a(16) =89198a(17) =178697a(18) =357852a(19) =716440a(20) =1434041a(21) =2869935a(22) =5742801a(23) =11490298a(24) =22988084a(25) =45988166a(26) =91995547a(27) =184021931a(28) =368093352a(29) =736266262