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”).

A031207 as a simple table

na(n)
112
218
321
424
539
642
745
854
978
1081
1187
1293
1399
14102
15108
16114
17117
18120
19129
20141
21144
22147
23168
24171
25174
26180
27186
28192
29201
30204
31210
32219
33222
34228
35234
36237
37240
38243
39267
40273
41276
42282
43291
44309
45324
46327
47333
48336
49339
50342
51348
52363

[12,18,21,24,39,42,45,54,78,81,87,93,99,102,108,
 114,117,120,129,141,144,147,168,171,174,180,186,
 192,201,204,210,219,222,228,234,237,240,243,267,
 273,276,282,291,309,324,327,333,336,339,342,348,
 363]