Column 1 of triangle A112682; also equals row sums of A112682 (with offset).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =19a(6) =43a(7) =94a(8) =210a(9) =464a(10) =1035a(11) =2295a(12) =5111a(13) =11352a(14) =25259a(15) =56145a(16) =124888a(17) =277669a(18) =617554a(19) =1373201a(20) =3053883a(21) =6790995a(22) =15102178a(23) =33583784a(24) =74684504a(25) =166082706a(26) =369337117a(27) =821331578a(28) =1826484804a(29) =4061741926