OFFSET
0,2
REFERENCES
N. Tokuda, An efficient Shell's method of sorting by generalized scheme, Department of Computer Science, Utunomiya University, 1989; 10 pages plus 9 unnumbered pages of tables and charts.
LINKS
Paolo Xausa, Table of n, a(n) for n = 0..1000
MATHEMATICA
NestList[Floor[9/4#]+1&, 1, 50] (* Paolo Xausa, Dec 02 2023 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 20 2023, following a suggestion from Don Knuth.
STATUS
approved