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A344311 as a simple table

na(n)
10
20
30
40
55
618
749
896
9198
10320
11550
12708
131235
141582
152415
162912
174284
184518
197068
208080
2111025
2212430
2316445
2416992
2523650
2626000
2732994
2835896
2944863
3042090
3159675
3264064
3377880
3483232
3599960
36102132
37126429
38133950
39157833
40166560
41194750
42191310
43237790
44249480
45287595
46301070

[0,0,0,0,5,18,49,96,198,320,550,708,1235,1582,
 2415,2912,4284,4518,7068,8080,11025,12430,16445,
 16992,23650,26000,32994,35896,44863,42090,59675,
 64064,77880,83232,99960,102132,126429,133950,
 157833,166560,194750,191310,237790,249480,287595,
 301070]