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A013956 as a simple table

n a(n)
1 1
2 257
3 6562
4 65793
5 390626
6 1686434
7 5764802
8 16843009
9 43053283
10 100390882
11 214358882
12 431733666
13 815730722
14 1481554114
15 2563287812
16 4311810305
17 6975757442
18 11064693731
19 16983563042
20 25700456418
21 37828630724
22 55090232674
23 78310985282
24 110523825058
25 152588281251

[1,257,6562,65793,390626,1686434,5764802,16843009,
 43053283,100390882,214358882,431733666,815730722,
 1481554114,2563287812,4311810305,6975757442,
 11064693731,16983563042,25700456418,37828630724,
 55090232674,78310985282,110523825058,152588281251]

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Last modified March 28 11:59 EDT 2024. Contains 371254 sequences. (Running on oeis4.)