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A082234
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In the following square array numbers are entered like this a(1,1),a(1,2),a(2,1),a(3,1),a(2,2),a(1,3),a(1,4),a(2,3),a(3,2),a(4,1),a(5,1),a(4,2),... such that every entry is the geometric mean of the two diametrically opposite neighbors ( wherever a pair exists). 1 2 4 8 16 32 64... 3 6 12 24 48 96 192... 9 18 36 72 144 288 576... 27 54 108 216 432 864 1728... ... Sequence contains numbers as they are entered.
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1
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1, 2, 3, 9, 6, 4, 8, 12, 18, 27, 81, 54, 36, 24, 16, 32, 48, 72, 108, 162
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| a(r, s) = 3^(r-1)*2^(s-1).
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EXAMPLE
| In the following square array numbers are entered like this a(1,1),a(1,2),a(2,1),a(3,1),a(2,2),a(1,3),a(1,4),a(2,3),a(3,2),a(4,1),a(5,1),a(4,2),...
such that every entry is the geometric mean of the two diametrically opposite neighbors ( wherever a pair exists).
1 2 4 8 16 32 64...
3 6 12 24 48 96 192...
9 18 36 72 144 288 576...
27 54 108 216 432 864 1728...
...
Sequence contains numbers as they are entered.
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CROSSREFS
| Cf. A082233.
Sequence in context: A127612 A038756 A011164 * A168221 A011028 A108694
Adjacent sequences: A082231 A082232 A082233 * A082235 A082236 A082237
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KEYWORD
| easy,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 10 2003
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