OFFSET
1,2
MATHEMATICA
hg[n_Integer?Positive] := hg[n] =hg[hg[n-1]] + hg[n -1- hg[n-1]] hg[1] = hg[2] = 1 digits=2^8 a=Table[hg[n], {n, 1, digits}] b=Table[If[a[[n]]-a[[n-1]]==0, a[[n]], 0], {n, 2, digits}]; c=Delete[Union[b], 1]
CROSSREFS
KEYWORD
nonn
AUTHOR
Roger L. Bagula, Oct 05 2003
STATUS
approved