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”).

A025658 as a simple table

na(n)
10
20
31
40
51
62
70
81
92
103
110
121
132
143
150
164
171
182
193
200
214
221
235
242
253
260
274
281
295
302
316
323
330
344
351
365
372
386
393
400
417
424
431
445
452
466
473
480
497
504
511
528
535
542
556
563
570
587
594
601
618
625
632
649
656
663
670
687
694
701
718
725
732
749
756
763
7710
780
797
804
811
828
835
842
859
866
873
8810
890
907
914
9211
931
948
955
962
979
986
993
10010
1010
1027
1034
10411
1051

[0,0,1,0,1,2,0,1,2,3,0,1,2,3,0,4,1,2,3,0,4,1,5,2,
 3,0,4,1,5,2,6,3,0,4,1,5,2,6,3,0,7,4,1,5,2,6,3,0,7,
 4,1,8,5,2,6,3,0,7,4,1,8,5,2,9,6,3,0,7,4,1,8,5,2,9,
 6,3,10,0,7,4,1,8,5,2,9,6,3,10,0,7,4,11,1,8,5,2,9,
 6,3,10,0,7,4,11,1]