A348579 Triangle T(n, k), n > 0, 0 < k <= n, read by rows; the n-th row contains, in ascending order, the numbers m such that A307730(m) = n.

1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 47, 48, 49, 50, 51, 7, 12, 13, 14, 15, 16, 52, 53, 54, 55, 56, 57, 58, 27, 28, 29, 30, 31, 32, 33, 34, 17, 18, 19, 20, 21, 22, 23, 24, 25, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 1374, 1375, 1376, 1377, 1378, 1379, 1380, 1381, 1382, 1383, 1384

Offset: 1

Author

Rémy Sigrist and N. J. A. Sloane, Oct 24 2021

Keywords

• nonn
• tabl

Examples

			Triangle T(n, k) begins:
  n\k|   1   2   3   4   5   6   7   8   9  10
  ---+----------------------------------------
    1|   1
    2|   2   3
    3|   4   5   6
    4|   8   9  10  11
    5|  47  48  49  50  51
    6|   7  12  13  14  15  16
    7|  52  53  54  55  56  57  58
    8|  27  28  29  30  31  32  33  34
    9|  17  18  19  20  21  22  23  24  25
   10|  60  61  62  63  64  65  66  67  68  69
		

Links

• Rémy Sigrist, Table of n, a(n) for n = 1..10011 (rows for n = 1..141, flattened)
• Rémy Sigrist, PARI program for A348579
• Index entries for sequences that are permutations of the natural numbers

Crossrefs

Cf. A307720, A307730, A348246, A348409.

Programs

PARI

See Links section.

Formula

T(n, 1) = A348246(n).

T(n, n) = A348409(n).