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A104618
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Write the natural numbers in base 15 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, 1, 6, 10, 2, 2, 10, 1, 3, 4, 7, 0, 5, 6, 12, 7, 8, 8, 10, 7, 11, 12, 1, 0, 1, 1, 1, 1, 1, 3, 1, 1, 5, 1, 1, 8, 1, 1, 11, 1, 1, 14, 2, 2, 2, 2, 2, 5, 2, 2, 9, 2, 2, 13, 2, 3, 2, 3, 3, 6, 3, 3, 10, 3, 3, 0, 4, 4, 5, 4, 4, 10, 4, 4, 0, 5, 5, 5, 5, 5, 11, 5, 6, 2, 6, 6, 8, 6, 6, 14, 7, 7, 5, 7, 7
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| 1
23
456
789A
BCDE1
011121...
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MATHEMATICA
| t = Flatten[ IntegerDigits[ Range[1900], 15]]; t[[Table[n(n + 1)/2, {n, 100}]]]
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CROSSREFS
| Cf. A104606, A104607, A104608, A104609, A104610, A104611, A104612, A104613, A091425, A104614, A104615, A104616, A104617, A104619, A104620.
Sequence in context: A115251 A057241 A104617 * A104616 A104614 A133302
Adjacent sequences: A104615 A104616 A104617 * A104619 A104620 A104621
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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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