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”).

A074688 as a simple table

na(n)
00
11
23
32
47
58
64
75
86
918
1020
1121
1222
1317
1410
159
1611
1712
1813
1914
2015
2119
2216
2350
2455
2561
2657
2749
2862
2959
3063
3164
3258
3346
3445
3554
3648
3726
3827
3923
4024
4125
4229
4328
4430
4531
4632
4733
4834
4935
5036
5138
5237
5339
5440
5541
5651
5752
5856
5960
6042
6143
6244
6347
6453
65148
66162
67167
68181
69147

[0,1,3,2,7,8,4,5,6,18,20,21,22,17,10,9,11,12,13,
 14,15,19,16,50,55,61,57,49,62,59,63,64,58,46,45,
 54,48,26,27,23,24,25,29,28,30,31,32,33,34,35,36,
 38,37,39,40,41,51,52,56,60,42,43,44,47,53,148,162,
 167,181,147]