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A207451 as a simple table

na(n)
126
2676
33354
410088
523530
646956
784266
8139984
9219258
10327860
11472186
12659256
13896714
141192828
151556490
161997216
172525146
183151044
193886298
204742920
215733546
226871436
238170474
249645168
2511310650
2613182676
2715277626
2817612504
2920204938

[26,676,3354,10088,23530,46956,84266,139984,
 219258,327860,472186,659256,896714,1192828,
 1556490,1997216,2525146,3151044,3886298,4742920,
 5733546,6871436,8170474,9645168,11310650,13182676,
 15277626,17612504,20204938]