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A042872 as a simple table

n a(n)
0 31
1 249
2 280
3 1929
4 2209
5 19601
6 1217471
7 9759369
8 10976840
9 75620409
10 86597249
11 768398401
12 47727298111
13 382586783289
14 430314081400
15 2964471271689
16 3394785353089
17 30122754096401
18 1871005539329951
19 14998167068736009
20 16869172608065960
21 116213202717131769

[31,249,280,1929,2209,19601,1217471,9759369,
 10976840,75620409,86597249,768398401,47727298111,
 382586783289,430314081400,2964471271689,
 3394785353089,30122754096401,1871005539329951,
 14998167068736009,16869172608065960,
 116213202717131769]

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Last modified March 25 20:10 EDT 2019. Contains 321477 sequences. (Running on oeis4.)