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2, 3, 3, 5, 5, 5, 5, 9, 9, 9, 9, 13, 13, 13, 13, 17, 17, 17, 17, 17, 22, 22, 22, 25, 25, 25, 25, 25, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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See the "blog" file in A166133 for discussion.
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LINKS
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PROG
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(Haskell)
import Data.List (delete); import Data.List.Ordered (isect)
a256405 n = a256405_list !! (n-1)
a256405_list = 2 : 3 : f (3:[5..]) 4 where
f zs@(z:_) x = z : f (delete y zs) y where
y = head $ isect (a027750_row' (x ^ 2 - 1)) zs
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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