Basic numbers used in Sedgewick-Incerpi upper bound for shell sort.

Terms

a(0) =1a(1) =3a(2) =7a(3) =16a(4) =41a(5) =101a(6) =247a(7) =613a(8) =1529a(9) =3821a(10) =9539a(11) =23843a(12) =59611a(13) =149015a(14) =372539a(15) =931327a(16) =2328307a(17) =5820767a(18) =14551919a(19) =36379789a(20) =90949471a(21) =227373677a(22) =568434193a(23) =1421085473a(24) =3552713687a(25) =8881784201a(26) =22204460497a(27) =55511151233a(28) =138777878081a(29) =346944695197