|
|
A357323
|
|
Numbers k such that k and k+2 are both unitary untouchable numbers (A063948).
|
|
1
|
|
|
2, 3, 5, 30756, 34182, 46128, 51816, 56352, 72522, 86640, 88896, 119796, 133062, 133618, 149682, 164290, 207282, 207642, 213636, 245708, 257820, 261156, 279730, 283050, 286356, 286858, 310842, 318060, 327300, 339402, 339612, 349030, 360390, 371820, 377940, 384576, 396090
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Except for k=3, are there any other numbers k such that k, k+2 and k+4 are all unitary untouchable numbers? There are no such numbers below 10^6.
|
|
LINKS
|
|
|
MATHEMATICA
|
u = Cases[Import["https://oeis.org/A063948/b063948.txt", "Table"], {_, _}][[;; , 2]]; Select[u, MemberQ[u, # + 2] &]
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|