Apply partial sum operator 4 times to binary rooted tree numbers.

Terms

a(0) =1a(1) =5a(2) =16a(3) =41a(4) =92a(5) =190a(6) =372a(7) =703a(8) =1298a(9) =2361a(10) =4255a(11) =7628a(12) =13638a(13) =24357a(14) =43496a(15) =77704a(16) =138899a(17) =248450a(18) =444678a(19) =796314a(20) =1426644a(21) =2556825a(22) =4583600a(23) =8218728a(24) =14739136a(25) =26435727a(26) =47418602a(27) =85061737a(28) =152594941