Records in A001481 that are more than twice the previous record.

Terms

a(0) =1a(1) =4a(2) =9a(3) =20a(4) =41a(5) =85a(6) =173a(7) =349a(8) =701a(9) =1405a(10) =2813a(11) =5629a(12) =11261a(13) =22525a(14) =45053a(15) =90113a(16) =180232a(17) =360466a(18) =720937a(19) =1441877a(20) =2883761a(21) =5767525a(22) =11535053a(23) =23070112a(24) =46140228a(25) =92280457a(26) =184560921a(27) =369121849a(28) =738243700a(29) =1476487402