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A251816 as a simple table

n a(n)
1 1973
2 3501
3 18227
4 96649
5 504148
6 2670355
7 14105237
8 74389411
9 393421321
10 2079994178
11 10983498977
12 58012069015
13 306545373362
14 1619740160876
15 8557028037932
16 45206323422254
17 238837210760217
18 1261858577287914

[1973,3501,18227,96649,504148,2670355,14105237,
 74389411,393421321,2079994178,10983498977,
 58012069015,306545373362,1619740160876,
 8557028037932,45206323422254,238837210760217,
 1261858577287914]

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Last modified November 12 19:41 EST 2019. Contains 329078 sequences. (Running on oeis4.)