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A261971 as a simple table

na(n)
18
226
398
4218
5602
6866
71538
81946
92906
104706
115402
127778
139602
1410586
1512698
1616226
1720186
1821602
1926138
2029402
2131106
2236506
2340346
2446466
2555298
2660002
2762426
2867418
2969986
3075266
3195258
32101402
33110978
34114266
35131426
36135002
37146018
38157466

[8,26,98,218,602,866,1538,1946,2906,4706,5402,
 7778,9602,10586,12698,16226,20186,21602,26138,
 29402,31106,36506,40346,46466,55298,60002,62426,
 67418,69986,75266,95258,101402,110978,114266,
 131426,135002,146018,157466]