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Search: id:A132135
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| A132135 |
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Number of base-3 "Punctual Birds" with n base-3 digits. |
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+0
2
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| 2, 3, 4, 10, 20, 51, 133, 359, 975, 2700, 7506, 20962, 58968, 166170
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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a(2)=3 because 3 of the six 2-digit base-3 numbers appear in their Natural Place in the string of concatenated base-3 numbers. These 3 numbers are 3, 4, and 6 (10, 11, and 20 base-3).
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CROSSREFS
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Cf. A132134.
Sequence in context: A145028 A085932 A135056 this_sequence A131871 A132446 A123700
Adjacent sequences: A132132 A132133 A132134 this_sequence A132136 A132137 A132138
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KEYWORD
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nonn
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AUTHOR
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Graeme McRae (g_m(AT)mcraefamily.com), Aug 11 2007
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