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.

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A344008 Triangle of numerators corresponding to A344007.

Original entry on oeis.org

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 3, 2, 1, 1, 1, 1, 3, 1, 3, 1, 2, 1, 1, 1, 1, 3, 1, 3, 1, 1, 2, 1, 1, 1, 1, 3, 1, 1, 3, 1, 1, 2, 1, 4, 1, 1, 3, 1, 1, 1, 3, 1, 1, 2, 1, 4, 1, 1, 3, 1, 1, 1, 1, 3, 1, 1, 5, 1, 4, 1, 1, 3, 1, 1, 1, 1, 1, 3, 1
Offset: 1

Views

Author

Evan Lee, Jun 09 2021

Keywords

Examples

			The triangle underlying A344007 begins:
  1
  1/2,   1/2
  1/6,   1/3,   1/2
  1/6,   1/4,   1/4,   1/3
  2/15,  1/6,   1/5,   1/4,   1/4
  1/12,  2/15,  1/6,   1/6,   1/5,   1/4
  1/12,  3/28,  2/15,  1/7,   1/6,   1/6,   1/5
  3/40,  1/12,  3/28,  1/8,   2/15,  1/7,   1/6,   1/6
  1/18,  3/40,  1/12,  3/28,  1/9,   1/8,   2/15,  1/7,  1/6
  1/18,  1/15,  3/40,  1/12,  1/10,  3/28,  1/9,   1/8,  2/15,  1/7
  ...
The numerators are:
  1
  1, 1
  1, 1, 1
  1, 1, 1, 1
  2, 1, 1, 1, 1
  1, 2, 1, 1, 1, 1
  1, 3, 2, 1, 1, 1, 1
  3, 1, 3, 1, 2, 1, 1, 1
  1, 3, 1, 3, 1, 1, 2, 1, 1
  1, 1, 3, 1, 1, 3, 1, 1, 2, 1
  ...
		

Crossrefs

Programs

  • PARI
    lista(nn) = {my(row, nrow, drow); for (n=1, nn, if (n==1, row = [1], k = vecmax(row); nrow = row; nrow[n-1] = 1/n; nrow = concat(nrow, k - 1/n); row = vecsort(nrow);); drow = apply(numerator, row); for (k=1, #drow, print1(drow[k], ", ")););} \\ Michel Marcus, Jun 09 2021

Extensions

Corrected by Hugo Pfoertner and Michel Marcus, Jun 09 2021
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