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”).

A277487 as a simple table

na(n)
11
20
31
40
50
61
72
81
91
100
112
121
132
140
153
162
170
183
190
202
210
221
234
242
253
262
274
282
290
303
313
322
335
343
354
363
373
383
392
404
412
422
434
443
453
463
476
483
491
503
514
522
536
543
553
562
575
585
595
605
614
623
637
644
654
666
674
682
694
706
715
725
735
744
757
764
774
787
794
800
815
826
837
844
854
869
874
885
892
906
916
927
9311
943
956
964
979
985
997
1007
1017
1026
1038
1048
1057
1066
1074
1086
1095
1107
1118
1125
1139
1148
1158
1165
11712
1187
1195
1206

[1,0,1,0,0,1,2,1,1,0,2,1,2,0,3,2,0,3,0,2,0,1,4,2,
 3,2,4,2,0,3,3,2,5,3,4,3,3,3,2,4,2,2,4,3,3,3,6,3,1,
 3,4,2,6,3,3,2,5,5,5,5,4,3,7,4,4,6,4,2,4,6,5,5,5,4,
 7,4,4,7,4,0,5,6,7,4,4,9,4,5,2,6,6,7,11,3,6,4,9,5,
 7,7,7,6,8,8,7,6,4,6,5,7,8,5,9,8,8,5,12,7,5,6]