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”).

A023174 as a simple table

na(n)
11
23
36
477
593
6123
7143
8213
9237
10267
11453
12483
13573
14597
15627
16717
17723
18813
19843
20933
211077
221203
231227
241293
251317
261347
271437
281517
291563
301707
311763
321797
331803
341893
351923
362157
372253
382283
392307
402427
412517
422643
432691
442733
452757
462787
472973
483021

[1,3,6,77,93,123,143,213,237,267,453,483,573,597,
 627,717,723,813,843,933,1077,1203,1227,1293,1317,
 1347,1437,1517,1563,1707,1763,1797,1803,1893,1923,
 2157,2253,2283,2307,2427,2517,2643,2691,2733,2757,
 2787,2973,3021]