#A130181: Largest k > 1 such that (sum of digits of k^n)*(sum of digits of k^(n+1)) = k, or 0 if no such k exists.
#Table of n, a(n) for n = 1..54
1 486
2 1215
3 4374
4 4672
5 12862
6 12649
7 23408
8 32761
9 47477
10 56852
11 59048
12 90746
13 116864
14 112346
15 139472
16 149705
17 190512
18 234247
19 254015
20 0
21 322322
22 331775
23 391238
24 446512
25 454951
26 546121
27 530145
28 316250
29 613927
30 763795
31 786664
32 809936
33 771799
34 918216
35 901368
36 1042405
37 1127115
38 1078208
39 1285956
40 1285956
41 1402858
42 1476631
43 1454355
44 1552122
45 1708906
46 1869399
47 1774223
48 1895805
49 1973944
50 2073565
51 2321615
52 2228067
53 2410912
54 2551986
#END