A350300 -id:A350300 - cp's OEIS frontend

A350301 Irregular triangle read by rows: The n-th row lists the smaller number in each "n-th power friendship", that is, numbers k such that digsum(digsum(k^n)^n) = k and digsum(k^n) > k.

13, 19, 18, 23, 31, 38, 44, 46, 56, 64, 35, 109, 52, 112, 118, 127, 97, 108, 144, 88, 144, 139, 152, 153, 154, 173, 178, 189, 172, 199, 203, 187, 234, 127, 188, 148, 238, 115, 229, 238, 239, 245, 234, 244, 245, 283, 252, 283, 161, 271, 288, 163, 259, 295, 316

Offset: 2

Daniel Carter, Dec 23 2021

			Triangle begins:
  13;
  19;
  18;
  23, 31;
  ;
  38, 44, 46, 56;
  64;
  35;
  ;
  ;
  109;
  52, 112, 118, 127;
  97, 108;
  144;
  88, 144;
  ...

Cf. A007953, A350300, A350302.

A350302 Irregular triangle read by rows: The n-th row lists the larger number in each "n-th power friendship", that is, numbers k such that digsum(digsum(k^n)^n) = k and digsum(k^n) < k.

Original entry on oeis.org

16, 28, 27, 29, 34, 47, 55, 62, 65, 73, 80, 127, 70, 121, 136, 181, 117, 130, 153, 153, 160, 161, 176, 181, 184, 187, 189, 198, 208, 221, 235, 193, 252, 190, 233, 220, 247, 220, 254, 257, 259, 277, 279, 289, 263, 319, 261, 331, 260, 297, 316, 280, 304, 313

Offset: 2

Daniel Carter, Dec 23 2021

			Triangle begins:
  16;
  28;
  27;
  29, 34;
  ;
  47, 55, 62, 65;
  73;
  80;
  ;
  ;
  127;
  70, 121, 136, 181;
  117, 130;
  153;
  153, 160;
  ...

Cf. A007953, A350300, A350301.

cp's OEIS Frontend

A350301 Irregular triangle read by rows: The n-th row lists the smaller number in each "n-th power friendship", that is, numbers k such that digsum(digsum(k^n)^n) = k and digsum(k^n) > k.

Views

Author

Keywords