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A026121 as a simple table

n a(n)
0 0
1 3
2 36
3 351
4 3240
5 29403
6 265356
7 2390391
8 21520080
9 193700403
10 1743362676
11 15690441231
12 141214502520
13 1270932117003
14 11438393835996
15 102945558872871
16 926510072902560
17 8338590785263203
18 75047317454789316
19 675425858255365311

[0,3,36,351,3240,29403,265356,2390391,21520080,
 193700403,1743362676,15690441231,141214502520,
 1270932117003,11438393835996,102945558872871,
 926510072902560,8338590785263203,
 75047317454789316,675425858255365311]

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Last modified November 18 14:59 EST 2019. Contains 329262 sequences. (Running on oeis4.)