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Search: id:A134562
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| A134562 |
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Array T by antidiagonals: T(n,k) = k-th number whose formal base-3 representation has exactly n terms. ("Formal" means that all the nonzero coefficients are 1's.). |
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1
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| 1, 3, 2, 9, 4, 5, 27, 6, 7, 8, 81, 10, 11, 14, 17, 243, 12, 13, 16, 23, 26, 729, 18, 15, 20, 25, 44, 53, 2187, 28, 19, 22, 35, 50, 71
(list; table; graph; listen)
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OFFSET
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1,2
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COMMENT
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A permutation of the natural numbers. Except for initial terms in some cases, (Row 1) = A000244 (Row 2) = A055235 (Col 1) = A062318 (= A112346?) For analogous base-2 array, see A067576.
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EXAMPLE
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11 = 9 + 1 + 1 is the 3rd largest number (after 5 and 7) that has
a 3-term formal base-3 representation.
Northwest corner:
1 3 9 27 81
2 4 6 10 12
5 7 11 13 15
8 14 16 20 22
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CROSSREFS
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Cf. A067576.
Adjacent sequences: A134559 A134560 A134561 this_sequence A134563 A134564 A134565
Sequence in context: A060481 A010271 A104005 this_sequence A090639 A090880 A064614
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KEYWORD
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nonn,tabl
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu), Nov 01 2007
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