A210837 - OEIS

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A210837 as a simple table

n	a(n)
1	4
2	157
3	34848
4	32087451
5	116765092684
6	1675364225009869
7	94777043088521233200
8	21139495208799287816738519
9	18590180528543794272963690721687
10	64457007550068881643906256762264646455

[4,157,34848,32087451,116765092684, 1675364225009869,94777043088521233200, 21139495208799287816738519, 18590180528543794272963690721687, 64457007550068881643906256762264646455]