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A374817
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Irregular table T(n, k), n > 0, k = 1..A000005(n), read by rows; the n-th row lists the numbers m such that A003991(m) = n.
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3
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1, 2, 3, 4, 6, 5, 7, 10, 11, 15, 8, 9, 16, 21, 22, 28, 12, 14, 29, 36, 13, 37, 45, 17, 20, 46, 55, 56, 66, 18, 19, 23, 27, 67, 78, 79, 91, 30, 35, 92, 105, 24, 26, 106, 120, 25, 38, 44, 121, 136, 137, 153, 31, 34, 47, 54, 154, 171, 172, 190, 32, 33, 57, 65, 191, 210
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listen;
history;
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internal format)
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OFFSET
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1,2
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COMMENTS
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A003991 corresponds to a square array, but we consider it here as a flat sequence (when its values are read according along its antidiagonals).
This sequence is a permutation of the positive integers with inverse A374818.
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LINKS
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FORMULA
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EXAMPLE
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Table T(n, k) begins:
n n-th row
-- ----------------------
1 1
2 2, 3
3 4, 6
4 5, 7, 10
5 11, 15
6 8, 9, 16, 21
7 22, 28
8 12, 14, 29, 36
9 13, 37, 45
10 17, 20, 46, 55
11 56, 66
12 18, 19, 23, 27, 67, 78
13 79, 91
14 30, 35, 92, 105
15 24, 26, 106, 120
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PROG
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(PARI) \\ See Links section.
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CROSSREFS
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See A374799 for a similar sequence.
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KEYWORD
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nonn,tabf
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AUTHOR
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STATUS
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approved
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