|
|
A247839
|
|
Smallest Brady number with n digits.
|
|
1
|
|
|
2308, 10830, 119485, 1325165, 14696300, 100729939, 1117112142, 12388963501, 137395710653, 1523741780684, 10443881535043, 115824421096014, 1284512513591197, 14245462070599181, 157984595290182188, 1082842525215598387, 12008907626959811406, 133180826421773523853
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
4,1
|
|
COMMENTS
|
If n > 4, 1 < a(n)/10^(n-1) < phi. Successive records are at n = 5, 6, 7, 8, 13, 18, 32, 46, 60, 74, 181, 14807, 29433, 44059, 58685, 1223375, .... - Charles R Greathouse IV, Jan 20 2016
|
|
LINKS
|
Brady Haran and Matt Parker, Brady Numbers, Numberphile video (2014)
|
|
PROG
|
(PARI) A247698(n)=([1, 1; 1, 0]^n*[1953; 355])[1, 1]
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base,easy
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|