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A067981 as a simple table

n a(n)
0 4
1 19
2 48
3 107
4 220
5 432
6 822
7 1529
8 2796
9 5045
10 9006
11 15936
12 27992
13 48863
14 84840
15 146623
16 252368
17 432816
18 739914
19 1261285
20 2144484
21 3637609
22 6157218
23 10401792
24 17541100
25 29531947
26 49644192
27 83336339

[4,19,48,107,220,432,822,1529,2796,5045,9006,
 15936,27992,48863,84840,146623,252368,432816,
 739914,1261285,2144484,3637609,6157218,10401792,
 17541100,29531947,49644192,83336339]

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Last modified April 16 11:08 EDT 2024. Contains 371711 sequences. (Running on oeis4.)