A365232 -id:A365232 - cp's OEIS frontend

A365233 Inverse permutation to A365232.

0, 1, 3, 2, 6, 4, 5, 7, 10, 11, 8, 12, 9, 13, 14, 15, 21, 16, 17, 22, 18, 24, 23, 27, 19, 25, 28, 29, 31, 32, 30, 20, 36, 37, 38, 44, 39, 45, 47, 46, 40, 49, 53, 55, 48, 54, 57, 26, 34, 42, 51, 56, 58, 61, 63, 64, 59, 66, 35, 43, 69, 67, 52, 33, 78, 79, 68, 80

Offset: 0

Rémy Sigrist, Aug 27 2023

			A365232(42) = 49, hence a(49) = 42.

Rémy Sigrist, Table of n, a(n) for n = 0..10000
Rémy Sigrist, PARI program
Index entries for sequences that are permutations of the natural numbers

Cf. A365232.

PARI
```
See Links section.
```

A365230 Triangle T(n, k), n > 0, k = 1..n, read by rows and filled the greedy way with distinct positive integers such that T(n, k) is a multiple of T(k, 1).

Original entry on oeis.org

1, 2, 4, 3, 6, 9, 5, 8, 12, 10, 7, 14, 15, 20, 21, 11, 16, 18, 25, 28, 22, 13, 24, 27, 30, 35, 33, 26, 17, 32, 36, 40, 42, 44, 39, 34, 19, 38, 45, 50, 49, 55, 52, 51, 57, 23, 46, 48, 60, 56, 66, 65, 68, 76, 69, 29, 54, 63, 70, 77, 88, 78, 85, 95, 92, 58

Offset: 1

Rémy Sigrist, Aug 27 2023

As a flat sequence, this is a permutation of the positive integers (as each row starts with the least value not yet in the sequence); see A365231 for the inverse.

			Triangle T(n, k) begins:
         1;
         2,  4;
         3,  6,  9;
         5,  8, 12, 10;
         7, 14, 15, 20, 21;
        11, 16, 18, 25, 28, 22;
        13, 24, 27, 30, 35, 33, 26;
        17, 32, 36, 40, 42, 44, 39, 34;
        19, 38, 45, 50, 49, 55, 52, 51, 57;
        ...................................
T(k, 1)  1   2   3   5   7  11  13  17  19

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

See A364884 and A365232 for similar sequences.

Cf. A365231 (inverse).

PARI
```
See Links section.
```

cp's OEIS Frontend

A365233 Inverse permutation to A365232.

Views

Author

Keywords

Examples

Links

Crossrefs

Programs

PARI