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Search: id:A133445
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| A133445 |
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Digit sum of "sloping ternary numbers". |
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+0
1
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| 0, 1, 3, 1, 2, 4, 2, 4, 3, 1, 2, 4, 2, 3, 5, 3, 5, 4, 2, 3, 5, 3, 4, 6, 5, 4, 3, 1
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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Digit sum of A102370 "sloping binary numbers" equals A089400. What about "sloping numbers" and their digit sums in other bases ?
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FORMULA
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Digit sum of "sloping ternary numbers" : write numbers in ternary under each other (right justified), read diagonals in upward direction,sum digits.
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EXAMPLE
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........0
.......1
.......2
......10
......11
......12
......20
......21
......22
.....100
.....101
.....102
........
The upward-sloping diagonals are:
0
1
12
10
11
22
20
121
102
......
giving 0, 1, 3, 1, 2, 4, 2, 4, 3, 1, 2, 4, ...
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CROSSREFS
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Cf. A102370.
Sequence in context: A073892 A004608 A117905 this_sequence A139457 A049992 A074585
Adjacent sequences: A133442 A133443 A133444 this_sequence A133446 A133447 A133448
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KEYWORD
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nonn
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AUTHOR
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Ctibor O. ZIZKA (ctibor.zizka(AT)seznam.cz), Dec 22 2007
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