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A015220 as a simple table

n a(n)
0 0
1 4
2 10
3 20
4 56
5 84
6 120
7 220
8 286
9 364
10 560
11 680
12 816
13 1140
14 1330
15 1540
16 2024
17 2300
18 2600
19 3276
20 3654
21 4060
22 4960
23 5456
24 5984
25 7140
26 7770
27 8436
28 9880
29 10660
30 11480
31 13244
32 14190
33 15180
34 17296
35 18424
36 19600
37 22100
38 23426
39 24804
40 27720
41 29260
42 30856
43 34220
44 35990

[0,4,10,20,56,84,120,220,286,364,560,680,816,1140,
 1330,1540,2024,2300,2600,3276,3654,4060,4960,5456,
 5984,7140,7770,8436,9880,10660,11480,13244,14190,
 15180,17296,18424,19600,22100,23426,24804,27720,
 29260,30856,34220,35990]

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Last modified April 25 05:56 EDT 2024. Contains 371964 sequences. (Running on oeis4.)