OFFSET
1,2
COMMENTS
Similar to Hofstadter's Q-sequence A005185 but with different starting values.
Much like the Hofstadter Q-sequence, it is not known if this sequence is defined for all positive n.
a(n) exists for n <= 3*10^7.
LINKS
Nathan Fox, Table of n, a(n) for n = 1..10000
Altug Alkan, On a Generalization of Hofstadter's Q-Sequence: A Family of Chaotic Generational Structures, Complexity (2018) Article ID 8517125.
N. Fox, Hofstadter-like Sequences over Nonstandard Integers, Talk given at the Rutgers Experimental Mathematics Seminar, November 10 2016.
MATHEMATICA
Nest[Append[#1, #1[[#2 - #1[[-1]] ]] + #1[[#2 - #1[[-2]] ]]] & @@ {#, 1 + Length@ #} &, Range@ 4, 65] (* Michael De Vlieger, Sep 26 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Nathan Fox, Nov 10 2016
STATUS
approved