a(n) is the largest number in the n-th row of triangle A140997.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =15a(6) =28a(7) =52a(8) =96a(9) =177a(10) =345a(11) =694a(12) =1386a(13) =2751a(14) =5431a(15) =10672a(16) =20885a(17) =40724a(18) =79153a(19) =153402a(20) =296528a(21) =571845a(22) =1129293a(23) =2264749a(24) =4527029a(25) =9021498a(26) =17926740a(27) =35527082a(28) =70230422a(29) =138504765