

A283898


Relative of Hofstadter Qsequence: a(311) = 312, a(310) = 4, a(309) = 312, a(308) = 4; thereafter a(n) = a(na(n1)) + a(na(n2)).


5



624, 4, 312, 8, 624, 4, 312, 12, 624, 4, 312, 16, 624, 4, 312, 20, 624, 4, 312, 24, 624, 4, 312, 28, 624, 4, 312, 32, 624, 4, 312, 36, 624, 4, 312, 40, 624, 4, 312, 44, 624, 4, 312, 48, 624, 4, 312, 52, 624, 4, 312, 56, 624, 4, 312, 60
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OFFSET

1,1


COMMENTS

In calculating terms of this sequence, use the convention that a(n)=0 for n<=312.
Sequences like this are more naturally considered with the first nonzero term in position 1. But this sequence would then begin with 312 terms consisting entirely of alternating 4 and 312.
This sequence has exactly 6632 terms, since a(6632)=0 and computing a(6633) would refer to itself.


LINKS

Nathan Fox, Table of n, a(n) for n = 1..6632


MAPLE

A283898:=proc(n) option remember: if n <= 312 then 0: elif n = 311 then 312: elif n = 310 then 4: elif n = 309 then 312: elif n = 308 then 4: else A283898(nA283898(n1)) + A283898(nA283898(n2)): fi: end:


CROSSREFS

Cf. A005185, A283899, A283900, A283901, A283902.
Sequence in context: A255086 A158373 A265119 * A035479 A180453 A216843
Adjacent sequences: A283895 A283896 A283897 * A283899 A283900 A283901


KEYWORD

nonn,fini,full


AUTHOR

Nathan Fox, Mar 19 2017


STATUS

approved



