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”).

A304571 as a simple table

na(n)
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
191
200
210
220
230
240
250
260
270
280
290
300
310
320
330
341
350
360
370
380
390
400
410
421
430
440
450
460
470
480
491
500
511
520
531
540
550
560
570
580
590
600
610
620
630
640
650
660
670
680
690
700
710
720
730
741
751
761
770
780
790
800
810
820
830
840
850
860
870

[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,
 0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,
 0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
 1,1,0,0,0,0,0,0,0,0,0,0,0]