A337947 Numbers that do not appear in the addition or multiplication table of A337946.

5, 11, 16, 17, 18, 20, 26, 27, 28, 32, 35, 38, 39, 40, 41, 43, 45, 46, 51, 53, 55, 56, 57, 58, 63, 65, 67, 70, 71, 72, 74, 75, 76, 78, 79, 80, 81, 82, 87, 89, 93, 95, 96, 98, 99, 100, 101, 102, 103, 104, 105, 106, 109, 110, 111, 112, 117, 118, 119, 121, 123

Offset

1,1

Links

Peter Kagey, Table of n, a(n) for n = 1..10000

Example

The addition table of A337946(k) for k=1..5:
   + | 1 3  7 12 22
  ---+-------------
   1 | 2 4  8 13 23
   3 |   6 10 15 25
   7 |     14 19 29
  12 |        24 34
  22 |           44
The multiplication table of A337946(k) for k=1..5:
   * | 1 3  7  12  22
  ---+---------------
   1 | 1 3  7  12  22
   3 |   9 21  36  66
   7 |     49  84 154
  12 |        144 264
  22 |            484
Neither of these two tables contain 5, 11, 16, 17, 18, or 20. Since each row is strictly increasing, the rest of the two (infinite) tables do not contain these values either.

Crossrefs

Cf. A263995, A337657, A337658, A337946.

Sequence in context: A137012 A259067 A314080 * A072557 A324076 A314081

Adjacent sequences: A337944 A337945 A337946 * A337948 A337949 A337950

Keyword

nonn

Author

Peter Kagey, Oct 02 2020

Status

approved