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”).

A121081 as a simple table

na(n)
11
21
32
42
53
65
76
88
911
1014
1118
1224
1330
1438
1549
1661
1776
1896
19118
20146
21181
22221
23270
24331
25401
26486
27589
28709
29852
301025
311225
321463
331746
342075
352463
362922
373453
384077
394808
405656
416644
427798
439130
4410678
4512475
4614547
4716942
4819714
4922898
5026570
5130798

[1,1,2,2,3,5,6,8,11,14,18,24,30,38,49,61,76,96,
 118,146,181,221,270,331,401,486,589,709,852,1025,
 1225,1463,1746,2075,2463,2922,3453,4077,4808,5656,
 6644,7798,9130,10678,12475,14547,16942,19714,
 22898,26570,30798]