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A316823 as a simple table

na(n)
00
11
22
33
44
5-4
6-3
7-2
8-1
99
1010
1111
1212
1313
145
156
167
178
1818
1919
2020
2121
2222
2314
2415
2516
2617
2727
2828
2929
3030
3131
3223
3324
3425
3526
3636
3737
3838
3939
4040
4132
4233
4334
4435
45-36
46-35
47-34
48-33
49-32
50-40
51-39
52-38
53-37
54-27
55-26
56-25
57-24
58-23
59-31
60-30
61-29
62-28

[0,1,2,3,4,-4,-3,-2,-1,9,10,11,12,13,5,6,7,8,18,
 19,20,21,22,14,15,16,17,27,28,29,30,31,23,24,25,
 26,36,37,38,39,40,32,33,34,35,-36,-35,-34,-33,-32,
 -40,-39,-38,-37,-27,-26,-25,-24,-23,-31,-30,-29,
 -28]