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Search: id:A082229
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| A082229 |
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In the following square array numbers (not occurring earlier) 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 partial sum (n>1) of the rows is composite and every partial sum (n>1) of the columns is prime. 1 3 5 6... 2 8 12... 4 18... 10 24... 14... Sequence contains the first row. |
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5
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OFFSET
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1,2
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EXAMPLE
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In the following square array numbers (not occurring earlier) 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 partial sum (n>1) of the rows is composite and every partial sum (n>1) of the columns is prime.
1 3 5 6...
2 8 12...
4 18...
10 24...
14...
...
e.g. the third partial sum of the second row is 2+8+12=22 is composite while the same for the second column is 3+8+18 = 29 is prime.
Sequence contains the first row.
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CROSSREFS
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Cf. A082224, A082225, A082226, A082227, A082228, A082230, A082231.
Sequence in context: A072624 A019247 A111950 this_sequence A078064 A091517 A106117
Adjacent sequences: A082226 A082227 A082228 this_sequence A082230 A082231 A082232
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KEYWORD
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hard,more,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 09 2003
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