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A368194
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Irregular table T(n, k), n > 0, k = 1..A368195(n), read by rows: the n-th row lists the numbers that can be obtained by replacing any positive number without leading zeros, say m, appearing in the decimal expansion of n by one of the divisors of m.
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4
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1, 1, 2, 1, 3, 1, 2, 4, 1, 5, 1, 2, 3, 6, 1, 7, 1, 2, 4, 8, 1, 3, 9, 1, 2, 5, 10, 1, 11, 1, 2, 3, 4, 6, 11, 12, 1, 11, 13, 1, 2, 7, 11, 12, 14, 1, 3, 5, 11, 15, 1, 2, 4, 8, 11, 12, 13, 16, 1, 11, 17, 1, 2, 3, 6, 9, 11, 12, 14, 18, 1, 11, 13, 19, 1, 2, 4, 5, 10, 20
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OFFSET
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1,3
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COMMENTS
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The n-th row starts with 1, ends with n, and contains the divisors of n (A027750).
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LINKS
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FORMULA
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T(n, 1) = 1.
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EXAMPLE
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Table T(n, k) begins:
1;
1, 2;
1, 3;
1, 2, 4;
1, 5;
1, 2, 3, 6;
1, 7;
1, 2, 4, 8;
1, 3, 9;
1, 2, 5, 10;
1, 11;
1, 2, 3, 4, 6, 11, 12;
1, 11, 13;
1, 2, 7, 11, 12, 14;
1, 3, 5, 11, 15;
1, 2, 4, 8, 11, 12, 13, 16;
1, 11, 17;
1, 2, 3, 6, 9, 11, 12, 14, 18;
...
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PROG
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(PARI) See Links section.
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CROSSREFS
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KEYWORD
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nonn,base,tabf
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AUTHOR
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STATUS
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approved
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