login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A040397 as a simple table

na(n)
020
12
24
320
44
52
640
72
84
920
104
112
1240
132
144
1520
164
172
1840
192
204
2120
224
232
2440
252
264
2720
284
292
3040
312
324
3320
344
352
3640
372
384
3920
404
412
4240
432
444
4520
464
472
4840
492
504
5120
524
532
5440
552
564
5720
584
592
6040
612
624
6320
644
652
6640
672
684
6920
704
712
7240
732
744
7520
764
772
7840
792
804

[20,2,4,20,4,2,40,2,4,20,4,2,40,2,4,20,4,2,40,2,4,
 20,4,2,40,2,4,20,4,2,40,2,4,20,4,2,40,2,4,20,4,2,
 40,2,4,20,4,2,40,2,4,20,4,2,40,2,4,20,4,2,40,2,4,
 20,4,2,40,2,4,20,4,2,40,2,4,20,4,2,40,2,4]