A006159 a(n)=a(a(n-4))+a(n-a(n-4)). (Formerly M0454)

1, 1, 1, 1, 2, 3, 4, 5, 5, 5, 5, 6, 7, 7, 7, 8, 9, 9, 10, 11, 11, 12, 12, 12, 12, 13, 13, 14, 15, 16, 16, 16, 16, 17, 18, 19, 19, 20, 20, 21, 22, 23, 23, 23, 24, 24, 24, 24, 24, 25, 25, 26, 27, 27, 28, 29

Offset

1,5

References

J. Arkin, D. C. Arney, L. S. Dewald and W. E. Ebel, Jr., Families of recursive sequences, J. Rec. Math., 22 (No. 22, 1990), 85-94.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

Table of n, a(n) for n=1..56.

Crossrefs

Sequence in context: A078474 A087177 A180600 * A376194 A081610 A063273

Adjacent sequences: A006156 A006157 A006158 * A006160 A006161 A006162

Keyword

nonn

Author

N. J. A. Sloane

Status

approved