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A030341
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Triangle T(n,k): write n in base 3, reverse order of digits.
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44
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0, 1, 2, 0, 1, 1, 1, 2, 1, 0, 2, 1, 2, 2, 2, 0, 0, 1, 1, 0, 1, 2, 0, 1, 0, 1, 1, 1, 1, 1, 2, 1, 1, 0, 2, 1, 1, 2, 1, 2, 2, 1, 0, 0, 2, 1, 0, 2, 2, 0, 2, 0, 1, 2, 1, 1, 2, 2, 1, 2, 0, 2, 2, 1, 2, 2, 2, 2, 2, 0, 0, 0, 1, 1, 0, 0, 1, 2, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 2, 1, 0, 1
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OFFSET
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0,3
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LINKS
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Eric Weisstein's World of Mathematics, Ternary.
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EXAMPLE
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Triangle begins :
0
1
2
0, 1
1, 1
2, 1
0, 2
1, 2
2, 2
0, 0, 1
1, 0, 1
2, 0, 1
0, 1, 1
1, 1, 1
2, 1, 1 ...
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MAPLE
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A030341_row := n -> op(convert(n, base, 3)):
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MATHEMATICA
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Flatten[Table[Reverse[IntegerDigits[n, 3]], {n, 0, 40}]] (* Harvey P. Dale, Oct 20 2014 *)
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PROG
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(Haskell)
a030341 n k = a030341_tabf !! n !! k
a030341_row n = a030341_tabf !! n
a030341_tabf = iterate succ [0] where
succ [] = [1]
succ (2:ts) = 0 : succ ts
succ (t:ts) = (t + 1) : ts
(PARI) A030341(n, k=-1)=/*k<0&&error("Flattened sequence not yet implemented.")*/n\3^k%3 \\ Assuming that columns are numbered starting with k=0 as in A030308, A030567 and others. - M. F. Hasler, Jul 21 2013
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CROSSREFS
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KEYWORD
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nonn,base,tabf,less
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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