A374797 Distinct value of A003990 (LCM table read by antidiagonals) in order of appearance.

1, 2, 3, 4, 6, 5, 10, 12, 7, 15, 8, 14, 20, 9, 21, 18, 24, 28, 30, 11, 35, 22, 36, 40, 42, 13, 33, 45, 26, 44, 56, 39, 55, 63, 16, 52, 60, 66, 70, 72, 17, 65, 77, 34, 48, 78, 84, 88, 90, 19, 51, 91, 99, 38, 68, 80, 104, 110, 57, 85, 105, 117, 76, 102, 112, 120

Offset

1,2

Comments

This sequence is a permutation of the positive integers with inverse A374798 and similar to A257471.

Links

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, PARI program

Index entries for sequences that are permutations of the natural numbers

Example

The first terms of A003990 are: 1, 2, 2, 3, 2, 3, 4, 6, 6, 4, 5, 4, 3, 4, 5, 6, 10. Removing duplicates yields 1, 2, 3, 4, 6, 5, 10.

Prog

(PARI) \\ See Links section.

Crossrefs

Cf. A003990, A257471 (analog for multiplication table), A374798 (inverse).

Sequence in context: A209268 A257798 A183079 * A119629 A014631 A263266

Adjacent sequences: A374794 A374795 A374796 * A374798 A374799 A374800

Keyword

nonn,look

Author

Rémy Sigrist, Jul 20 2024

Status

approved