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A061318 as a simple table

n a(n)
0 0
1 4
2 40
3 304
4 1720
5 7480
6 26404
7 79240
8 209304
9 499140
10 1095160
11 2242504
12 4332640
13 7966504
14 14036260
15 23829040
16 39156304
17 62512740
18 97268904
19 147902080
20 220270120
21 321933304
22 462529540
23 654208504
24 912130600
25 1255036900
26 1705896504
27 2292638040
28 3048972304
29 4015313320

[0,4,40,304,1720,7480,26404,79240,209304,499140,
 1095160,2242504,4332640,7966504,14036260,23829040,
 39156304,62512740,97268904,147902080,220270120,
 321933304,462529540,654208504,912130600,
 1255036900,1705896504,2292638040,3048972304,
 4015313320]

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)