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A155977 as a simple table

n a(n)
0 0
1 2
2 40
3 270
4 1088
5 3250
6 7992
7 17150
8 33280
9 59778
10 101000
11 162382
12 250560
13 373490
14 540568
15 762750
16 1052672
17 1424770
18 1895400
19 2482958
20 3208000
21 4093362
22 5164280
23 6448510
24 7976448
25 9781250
26 11898952
27 14368590
28 17232320
29 20535538

[0,2,40,270,1088,3250,7992,17150,33280,59778,
 101000,162382,250560,373490,540568,762750,1052672,
 1424770,1895400,2482958,3208000,4093362,5164280,
 6448510,7976448,9781250,11898952,14368590,
 17232320,20535538]

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Last modified May 30 18:38 EDT 2020. Contains 334728 sequences. (Running on oeis4.)