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A081492 as a simple table

na(n)
11
25
318
454
5135
6291
7560
8988
91629
102545
113806
125490
137683
1410479
1513980
1618296
1723545
1829853
1937354
2046190
2156511
2268475
2382248
2498004
25115925
26136201
27159030
28184618
29213179
30244935
31280116
32318960
33361713
34408629
35459970
36516006
37577015

[1,5,18,54,135,291,560,988,1629,2545,3806,5490,
 7683,10479,13980,18296,23545,29853,37354,46190,
 56511,68475,82248,98004,115925,136201,159030,
 184618,213179,244935,280116,318960,361713,408629,
 459970,516006,577015]