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A280402 as a simple table

na(n)
10
274
3554
43002
515476
678540
7388686
81909332
99276316
1044749702
11214274388
121020029010
134829443432
1422761611592
15106838241882
16499686947334
172329557905400
1810829426646892
1950212611191750
20232275648633150

[0,74,554,3002,15476,78540,388686,1909332,9276316,
 44749702,214274388,1020029010,4829443432,
 22761611592,106838241882,499686947334,
 2329557905400,10829426646892,50212611191750,
 232275648633150]