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A051798 as a simple table

n a(n)
0 1
1 13
2 55
3 155
4 350
5 686
6 1218
7 2010
8 3135
9 4675
10 6721
11 9373
12 12740
13 16940
14 22100
15 28356
16 35853
17 44745
18 55195
19 67375
20 81466
21 97658
22 116150
23 137150
24 160875
25 187551
26 217413
27 250705
28 287680
29 328600
30 373736
31 423368
32 477785
33 537285

[1,13,55,155,350,686,1218,2010,3135,4675,6721,
 9373,12740,16940,22100,28356,35853,44745,55195,
 67375,81466,97658,116150,137150,160875,187551,
 217413,250705,287680,328600,373736,423368,477785,
 537285]

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Last modified March 6 20:37 EST 2021. Contains 341850 sequences. (Running on oeis4.)