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A074860
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a(n) = a(n-1) + R(a(n-2)) + R(a(n-3)) where a(0)=a(1)=a(2)=1 and R(k) = A004086(k) is the reverse of k.
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1
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1, 1, 1, 3, 5, 9, 17, 31, 111, 195, 319, 1021, 2525, 4639, 11092, 25708, 64083, 173846, 292644, 979061, 2073724, 2680995, 7115676, 17380240, 30136219, 41109707, 136581181, 298634398, 550610143, 1625232666, 2859685613, 9863026929, 19691221772, 32153295043
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OFFSET
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0,4
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LINKS
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MAPLE
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R:= n-> (s-> parse(cat(s[-i]$i=1..length(s))))(""||n):
a:= proc(n) option remember; `if`(n<3, 1,
a(n-1) + R(a(n-2)) + R(a(n-3)))
end:
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CROSSREFS
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KEYWORD
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easy,base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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