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A280549 as a simple table

n a(n)
1 0
2 9
3 50
4 144
5 325
6 670
7 1316
8 2502
9 4654
10 8521
11 15412
12 27612
13 49085
14 86695
15 152282
16 266222
17 463487
18 803970
19 1390026
20 2396244
21 4119894
22 7066303
23 12093158
24 20654128
25 35209707
26 59919341
27 101806274
28 172716156
29 292607401
30 495074182
31 836609600

[0,9,50,144,325,670,1316,2502,4654,8521,15412,
 27612,49085,86695,152282,266222,463487,803970,
 1390026,2396244,4119894,7066303,12093158,20654128,
 35209707,59919341,101806274,172716156,292607401,
 495074182,836609600]

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Last modified April 23 02:53 EDT 2024. Contains 371906 sequences. (Running on oeis4.)