login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)

A020178 as a simple table

n a(n)
1 21
2 49
3 51
4 119
5 133
6 147
7 231
8 301
9 357
10 561
11 637
12 697
13 793
14 817
15 833
16 861
17 931
18 1037
19 1281
20 1649
21 1729
22 2009
23 2041
24 2047
25 2107
26 2499
27 2501
28 2701
29 2821
30 2989
31 3201
32 3281
33 3913
34 3977
35 4753
36 5461
37 5719
38 6601
39 7693
40 7701
41 8041
42 8113
43 8911
44 9061
45 9073
46 9331

[21,49,51,119,133,147,231,301,357,561,637,697,793,
 817,833,861,931,1037,1281,1649,1729,2009,2041,
 2047,2107,2499,2501,2701,2821,2989,3201,3281,3913,
 3977,4753,5461,5719,6601,7693,7701,8041,8113,8911,
 9061,9073,9331]

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 6 15:46 EDT 2024. Contains 372294 sequences. (Running on oeis4.)