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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.

User: Denver Massey

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Denver Massey has authored 1 sequences.

A355170 The composite numbers in order of appearance in A173395.

Original entry on oeis.org

4, 6, 8, 9, 10, 12, 15, 16, 14, 18, 20, 21, 24, 25, 28, 30, 27, 32, 35, 36, 22, 40, 42, 33, 45, 48, 49, 26, 44, 50, 54, 56, 39, 55, 60, 63, 64, 52, 66, 70, 72, 65, 77, 80, 81, 34, 78, 84, 88, 90, 51, 75, 91, 96, 99, 100, 38, 68, 98, 104, 108, 110, 57, 85, 105
Offset: 1

Author

Denver Massey, Jun 22 2022

Keywords

Comments

This sequence can be generated by removing duplicates from A173395. As such, every number in this sequence is composite, and every composite number appears in this sequence.
This gives a method of enumerating the composite numbers.

Examples

			This sequence can be generated by reading along the diagonals of the multiplication table with headers starting at 2, skipping any number that has already been seen:
   4  6  8 10 12 ...
   6  9 12 15 18 ...
   8 12 16 20 24 ...
  10 15 20 25 30 ...
  12 18 24 30 36 ...
  ...
		

Crossrefs

Cf. A173395, A257471 (similar construction).