

A283896


Relative of Hofstadter Qsequence: a(88) = 89, a(87) = 2; thereafter a(n) = a(na(n1)) + a(na(n2)).


5



91, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180, 2, 180
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OFFSET

1,1


COMMENTS

In calculating terms of this sequence, use the convention that a(n)=0 for n<=89.
Sequences like this are more naturally considered with the first nonzero term in position 1. But this sequence would then begin with 89 terms consisting entirely of alternating 2 and 89.
This sequence has exactly 2467 terms, since a(2467)=0 and computing a(2468) would refer to itself.


LINKS

Nathan Fox, Table of n, a(n) for n = 1..2467


MAPLE

A283896:=proc(n) option remember: if n <= 89 then 0: elif n = 88 then 89: elif n = 87 then 2: else A283896(nA283896(n1)) + A283896(nA283896(n2)): fi: end:


CROSSREFS

Cf. A005185, A278066, A278067, A278068, A283893, A283894, A283895, A283897.
Sequence in context: A172756 A306304 A175690 * A284439 A119656 A339141
Adjacent sequences: A283893 A283894 A283895 * A283897 A283898 A283899


KEYWORD

nonn,fini,full


AUTHOR

Nathan Fox, Mar 19 2017


STATUS

approved



