A381627 Irregular table T(n, k), n >= 0, k = 1..A381625(n): the n-th row lists the numbers m such that A381624(m) = n.

0, 1, 2, 3, 4, 5, 6, 7, 9, 8, 10, 11, 12, 13, 14, 15, 16, 18, 17, 19, 27, 20, 28, 21, 29, 22, 30, 23, 31, 24, 32, 25, 33, 26, 34, 36, 35, 37, 38, 39, 40, 41, 42, 43, 45, 44, 46, 54, 47, 55, 81, 48, 56, 82, 49, 57, 83, 50, 58, 84, 51, 59, 85, 52, 60, 86, 53, 61, 63, 87

Offset

0,3

Comments

As a flat sequence, this is a permutation of the nonnegative integers with inverse A381628.

Links

Rémy Sigrist, Table of n, a(n) for n = 0..9890

Rémy Sigrist, PARI program

Index entries for sequences that are permutations of the natural numbers

Example

Table T(n, k) begins:
  n   n-th row
  --  ----------
   0  0
   1  1
   2  2
   3  3
   4  4
   5  5
   6  6
   7  7, 9
   8  8, 10
   9  11
  10  12
  11  13
  12  14
  13  15
  14  16, 18
  15  17, 19, 27
  16  20, 28

Prog

(PARI) \\ See Links section.

Crossrefs

Cf. A381624, A381625, A381628 (inverse).

Sequence in context: A304481 A222254 A381628 * A235489 A065306 A065307

Adjacent sequences: A381624 A381625 A381626 * A381628 A381630 A381631

Keyword

nonn,base,tabf

Author

Rémy Sigrist, Mar 02 2025

Status

approved