Positions of high-water marks of A118421.

Terms

a(0) =1a(1) =4a(2) =5a(3) =11a(4) =14a(5) =19a(6) =20a(7) =23a(8) =26a(9) =41a(10) =53a(11) =68a(12) =86a(13) =110a(14) =145a(15) =170a(16) =200a(17) =236a(18) =326a(19) =425a(20) =431a(21) =536a(22) =695a(23) =1031a(24) =1061a(25) =1076a(26) =1115a(27) =1325a(28) =1391a(29) =1670