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A108681 as a simple table

n a(n)
0 1
1 15
2 98
3 420
4 1386
5 3822
6 9240
7 20196
8 40755
9 77077
10 138138
11 236600
12 389844
13 621180
14 961248
15 1449624
16 2136645
17 3085467
18 4374370
19 6099324
20 8376830
21 11347050
22 15177240
23 20065500
24 26244855
25 33987681
26 43610490
27 55479088
28 70014120
29 87697016
30 109076352
31 134774640

[1,15,98,420,1386,3822,9240,20196,40755,77077,
 138138,236600,389844,621180,961248,1449624,
 2136645,3085467,4374370,6099324,8376830,11347050,
 15177240,20065500,26244855,33987681,43610490,
 55479088,70014120,87697016,109076352,134774640]

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Last modified April 24 02:46 EDT 2024. Contains 371917 sequences. (Running on oeis4.)