login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A223489 as a simple table

na(n)
10
20
31
40
54
61
71
87
94
1019
1112
129
1322
1410
1532
169
1722
1833
1916
2027
2117
2230
2320
2465
2517
2666
2724
2874
2961
3073
3130
3249
3337
34106
3577
36114
3733
3840
3940
4049
4167
42119
4372
4449
4549
46183
47181
4854
4956
50149
51205
5290
53138
5494
5561
56178
57149
58102
5973
60254
6170
6281
63264
64117
6569

[0,0,1,0,4,1,1,7,4,19,12,9,22,10,32,9,22,33,16,27,
 17,30,20,65,17,66,24,74,61,73,30,49,37,106,77,114,
 33,40,40,49,67,119,72,49,49,183,181,54,56,149,205,
 90,138,94,61,178,149,102,73,254,70,81,264,117,69]