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”).

A241922 as a simple table

na(n)
12
22
32
40
51
60
71
84
90
100
111
122
134
140
150
161
172
184
194
2016
210
220
231
249
250
260
271
282
294
304
319
322
330
340
350
361
374
380
390
401
4116
424
434
449
4536
460
471
489
490
501
510
521
534
5416
550
561
570
580
591
609
614
620
631
649
650
661
679
6864
690
701
719
722
734
740
751
7625
770
781
7964
8025
814
820
831
8449
850
860
870
881
894
904
910
921
930
940
950
961
974
984
994
1009
10116

[2,2,2,0,1,0,1,4,0,0,1,2,4,0,0,1,2,4,4,16,0,0,1,9,
 0,0,1,2,4,4,9,2,0,0,0,1,4,0,0,1,16,4,4,9,36,0,1,9,
 0,1,0,1,4,16,0,1,0,0,1,9,4,0,1,9,0,1,9,64,0,1,9,2,
 4,0,1,25,0,1,64,25,4,0,1,49,0,0,0,1,4,4,0,1,0,0,0,
 1,4,4,4,9,16]