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A108675 as a simple table

n a(n)
0 1
1 21
2 157
3 707
4 2353
5 6405
6 15106
7 31998
8 62349
9 113641
10 196119
11 323401
12 513149
13 787801
14 1175364
15 1710268
16 2434281
17 3397485
18 4659313
19 6289647
20 8369977
21 10994621
22 14272006
23 18326010
24 23297365
25 29345121
26 36648171
27 45406837

[1,21,157,707,2353,6405,15106,31998,62349,113641,
 196119,323401,513149,787801,1175364,1710268,
 2434281,3397485,4659313,6289647,8369977,10994621,
 14272006,18326010,23297365,29345121,36648171,
 45406837]

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Last modified January 21 04:53 EST 2020. Contains 331104 sequences. (Running on oeis4.)