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A338013
The list of positive integers that do not appear in the addition or multiplication tables of A338012.
2
1, 2, 5, 11, 15, 17, 19, 24, 25, 29, 31, 32, 35, 39, 42, 43, 45, 47, 48, 49, 50, 51, 53, 56, 60, 61, 62, 63, 64, 66, 74, 75, 76, 79, 80, 81, 82, 83, 84, 86, 87, 88, 91, 94, 104, 106, 107, 108, 109, 112, 114, 115, 117, 119, 121, 125, 126, 128, 131, 132, 133
OFFSET
1,2
LINKS
EXAMPLE
The first four terms of this sequence are 1, 2, 5, and 11 because these are the four smallest positive integers that do not appear in the addition and multiplication tables of A338012.
Addition table begins:
+ | 0 3 4 10 18 23 34 55 67
-----+-------------------------------
0 | 0
3 | 3 6
4 | 4 7 8
10 | 10 13 14 20
18 | 18 21 22 28 36
23 | 23 26 27 33 41 46
34 | 34 37 38 44 52 57 68
55 | 55 58 59 65 73 78 89 110
67 | 67 70 71 77 85 90 101 122 134
Multiplication table begins:
* | 0 3 4 10 18 23 34 55 67
-----+---------------------------------------
0 | 0
3 | 0 9
4 | 0 12 16
10 | 0 30 40 100
18 | 0 54 72 180 324
23 | 0 69 92 230 414 529
34 | 0 102 136 340 612 782 1156
55 | 0 165 220 550 990 1265 1870 3025
67 | 0 201 268 670 1206 1541 2278 3685 4489
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Kagey, Oct 06 2020
STATUS
approved