cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-2 of 2 results.

A361940 Inverse permutation to A361926.

Original entry on oeis.org

1, 2, 3, 4, 6, 5, 7, 8, 10, 9, 11, 13, 15, 12, 16, 14, 21, 20, 22, 19, 18, 17, 28, 26, 29, 27, 36, 25, 37, 23, 45, 34, 24, 35, 33, 43, 46, 30, 55, 44, 56, 42, 66, 32, 31, 54, 67, 53, 52, 38, 78, 64, 79, 65, 41, 63, 39, 47, 91, 40, 92, 77, 75, 76, 105, 51, 106
Offset: 1

Views

Author

Rémy Sigrist, Mar 31 2023

Keywords

Examples

			A361926(17) = 22, so a(22) = 17.

Links

Crossrefs

Cf. A361926.

Programs

  • PARI
    See Links section.

A361927 Square array A(n, k) of distinct positive integers, n, k > 0, read and filled by upwards antidiagonals in the greedy way such that A(n, k) is a multiple of A(n, 1) and of A(1, k).

Original entry on oeis.org

1, 2, 3, 4, 6, 5, 7, 12, 10, 8, 9, 21, 20, 16, 11, 13, 18, 35, 24, 22, 14, 15, 39, 45, 56, 44, 28, 17, 19, 30, 65, 72, 77, 84, 34, 23, 25, 57, 60, 104, 99, 42, 68, 46, 26, 27, 75, 95, 120, 143, 126, 119, 92, 52, 29, 31, 54, 50, 152, 165, 182, 153, 161, 156, 58, 32
Offset: 1

Views

Author

Rémy Sigrist, Mar 30 2023

Keywords

Comments

This sequence is a variant of A361926.
As a flat sequence, this is a permutation of the positive integers with inverse A361941.

Examples

			Array A(n, k) begins:
  n\k |  1   2    3    4    5    6    7    8    9   10
  ----+-----------------------------------------------
    1 |  1   3    5    8   11   14   17   23   26   29
    2 |  2   6   10   16   22   28   34   46   52   58
    3 |  4  12   20   24   44   84   68   92  156  116
    4 |  7  21   35   56   77   42  119  161  364  203
    5 |  9  18   45   72   99  126  153  207  234  261
    6 | 13  39   65  104  143  182  221  299   78  377
    7 | 15  30   60  120  165  210  255  345  390  435
    8 | 19  57   95  152  209  266  323  437  494  551
    9 | 25  75   50  200  275  350  425  575  650  725
   10 | 27  54  135  216  297  378  459  621  702  783

Links

Crossrefs

Cf. A338919, A361926, A361941 (inverse).

Programs

  • PARI
    See Links section.
Showing 1-2 of 2 results.

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