A172929 - OEIS

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A172929 as a simple table

n	a(n)
1	1
2	3139
3	19546975
4	171475190227
5	1846780916614531
6	22800663583664571781
7	310323674631037864285609
8	4539465445191675494919391795
9	70241609479301663107223809203427
10	1136916899291276422087603683231884809

[1,3139,19546975,171475190227,1846780916614531, 22800663583664571781,310323674631037864285609, 4539465445191675494919391795, 70241609479301663107223809203427, 1136916899291276422087603683231884809]