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A027150 as a simple table

n a(n)
0 1
1 1
2 4
3 6
4 12
5 20
6 80
7 152
8 304
9 528
10 2176
11 4416
12 8832
13 15488
14 64768
15 135552
16 271104
17 477440
18 2013184
19 4289536
20 8579072
21 15144960
22 64200704
23 138407936
24 276815872
25 489431040
26 2082406400
27 4526702592
28 9053405184
29 16024403968

[1,1,4,6,12,20,80,152,304,528,2176,4416,8832,
 15488,64768,135552,271104,477440,2013184,4289536,
 8579072,15144960,64200704,138407936,276815872,
 489431040,2082406400,4526702592,9053405184,
 16024403968]

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Last modified January 18 11:57 EST 2022. Contains 350455 sequences. (Running on oeis4.)