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A104615
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Write the natural numbers in base 12 in a triangle with k digits in the k-th row, as shown below. Sequence gives the leading diagonal.
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15
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1, 3, 6, 10, 1, 4, 1, 2, 4, 9, 3, 3, 3, 10, 5, 6, 10, 7, 8, 9, 1, 0, 1, 1, 1, 1, 1, 3, 1, 1, 6, 1, 1, 8, 1, 1, 11, 2, 2, 3, 2, 2, 6, 2, 2, 10, 2, 3, 2, 3, 3, 6, 3, 3, 11, 4, 4, 3, 4, 4, 8, 4, 5, 2, 5, 5, 7, 5, 5, 1, 6, 6, 7, 6, 6, 1, 7, 7, 8, 7, 8, 2, 8, 8, 9, 9, 9, 5, 9, 9, 0, 10, 10, 8, 10, 11, 4, 11, 11, 0
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| 1
23
456
789A
B1011
121314...
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MATHEMATICA
| t = Flatten[ IntegerDigits[ Range[1900], 12]]; t[[Table[n(n + 1)/2, {n, 100}]]]
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CROSSREFS
| Cf. A104606, A104607, A104608, A104609, A104610, A104611, A104612, A104613, A091425, A104614, A104616, A104617, A104618, A104619, A104620.
Sequence in context: A104616 A104614 A133302 * A194047 A194035 A194049
Adjacent sequences: A104612 A104613 A104614 * A104616 A104617 A104618
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KEYWORD
| base,nonn
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Mar 16 2005
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