a(n) = Sum_{k=0..2^n-1} k*A261015(n,k).

Terms

a(0) =1a(1) =6a(2) =18a(3) =46a(4) =107a(5) =241a(6) =535a(7) =1178a(8) =2569a(9) =5546a(10) =11859a(11) =25156a(12) =53058a(13) =111379a(14) =232966a(15) =486023a(16) =1012185a(17) =2104729a(18) =4370644a(19) =9064924a(20) =18778766a(21) =38856079a(22) =80307630a(23) =165790125a(24) =341872016a(25) =704171185a(26) =1448812630a(27) =2977673003a(28) =6113469501a(29) =12538958895