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A274208型作为一个简单的表

n个a(n)
00
10
20
0
41
50
64
76
814
936
1077
11168
12395
13851
141921
154254
169461
1720991
1846619
19103360
20229461
21508731
221128706
232503028
245552197
2512313707
2627313442
2760581866
28134384684
29298097515
30661300177
311467072716
323254847737
337221496901
3416023112774
3535553756328

[0,0,0,0,1,0,4,6,14,36,77,168,395,851,1921,4254,9461,20991,46619,103360,229461,508731,1128706,2503028,5552197,12313707,27313442,60581866,134384684,298097515,661300177,1467072716,3254847737,7221496901,16023112774,35553756328]