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”).

A031725 as a simple table

na(n)
12211
28840
319887
435352
555235
679536
7108255
8141392
9178947
10220920
11267311
12318120
13373347
14432992
15497055
16565536
17638435
18715752
19797487
20883640
21974211
221069200
231168607
241272432
251380675
261493336
271610415
281731912
291857827
301988160

[2211,8840,19887,35352,55235,79536,108255,141392,
 178947,220920,267311,318120,373347,432992,497055,
 565536,638435,715752,797487,883640,974211,1069200,
 1168607,1272432,1380675,1493336,1610415,1731912,
 1857827,1988160]