Shifts left under OR-convolution with itself.

Terms

a(0) =1a(1) =1a(2) =2a(3) =7a(4) =20a(5) =58a(6) =174a(7) =519a(8) =1550a(9) =4634a(10) =13884a(11) =41616a(12) =124824a(13) =374390a(14) =1123288a(15) =3369297a(16) =10107324a(17) =30320434a(18) =90961626a(19) =272878138a(20) =818632094a(21) =2455888346a(22) =7367661682a(23) =22102935920a(24) =66308767426a(25) =198926187730a(26) =596778527246