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A155550 as a simple table

na(n)
1-2
21
36
44
511
618
77
816
925
1034
1110
1221
1332
1443
1554
1613
1726
1839
1952
2065
2178
2216
2331
2446
2561
2676
2791
28106
2919
3036
3153
3270
3387
34104
35121
36138
3722
3841
3960
4079
4198
42117
43136
44155
45174
4625
4746
4867
4988
50109
51130
52151
53172
54193
55214
5628
5751
5874
5997
60120
61143
62166
63189
64212

[-2,1,6,4,11,18,7,16,25,34,10,21,32,43,54,13,26,
 39,52,65,78,16,31,46,61,76,91,106,19,36,53,70,87,
 104,121,138,22,41,60,79,98,117,136,155,174,25,46,
 67,88,109,130,151,172,193,214,28,51,74,97,120,143,
 166,189,212]