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”).

A284117 as a simple table

na(n)
10
20
30
44
50
60
70
812
99
100
110
124
130
140
150
1628
170
189
190
204
210
220
230
2412
2525
260
2736
284
290
300
310
3260
330
340
350
3613
370
380
390
4012
410
420
430
444
459
460
470
4828
4949
5025
510
524
530
5436
550
5612
570
580
590
604
610
620
639
64124
650
660
670
684
690
700
710
7221
730
740
7525
764
770
780
790
8028
81117
820
830
844
850
860
870
8812
890
909
910
924
930
940
950
9660
970
9849
999
10029

[0,0,0,4,0,0,0,12,9,0,0,4,0,0,0,28,0,9,0,4,0,0,0,
 12,25,0,36,4,0,0,0,60,0,0,0,13,0,0,0,12,0,0,0,4,9,
 0,0,28,49,25,0,4,0,36,0,12,0,0,0,4,0,0,9,124,0,0,
 0,4,0,0,0,21,0,0,25,4,0,0,0,28,117,0,0,4,0,0,0,12,
 0,9,0,4,0,0,0,60,0,49,9,29]