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A228748 as a simple table

n a(n)
0 -2
1 0
2 -1
3 1
4 5
5 18
6 52
7 140
8 361
9 909
10 2255
11 5542
12 13538
13 32940
14 79939
15 193661
16 468625
17 1133118
18 2738432
19 6615760
20 15979301
21 38589489
22 93182755
23 224994602
24 543236038
25 1311570360
26 3166544519
27 7644930841
28 18456845405
29 44559332298

[-2,0,-1,1,5,18,52,140,361,909,2255,5542,13538,
 32940,79939,193661,468625,1133118,2738432,6615760,
 15979301,38589489,93182755,224994602,543236038,
 1311570360,3166544519,7644930841,18456845405,
 44559332298]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)