A247839
Smallest Brady number with n digits.
Original entry on oeis.org
2308, 10830, 119485, 1325165, 14696300, 100729939, 1117112142, 12388963501, 137395710653, 1523741780684, 10443881535043, 115824421096014, 1284512513591197, 14245462070599181, 157984595290182188, 1082842525215598387, 12008907626959811406, 133180826421773523853
Offset: 4
- Brady Haran and Matt Parker, Brady Numbers, Numberphile video (2014)
-
A247698(n)=([1,1;1,0]^n*[1953;355])[1,1]
a(n)=if(n<5,return(2308)); my(k=log(10^n/15720)\log((1+sqrt(5))/2),t); while(#Str(t=A247698(k))Charles R Greathouse IV, Jan 20 2016
A319604
Largest Brady number with n digits.
Original entry on oeis.org
6569, 73857, 818996, 9082813, 62254526, 690413273, 7656800529, 84915219092, 941724210541, 6454673763134, 71583428964617, 793872392373921, 8804179745077748, 97639849588229149, 669233485047004862, 7421913081219006521, 82310277378456076593, 912834964244235849044
Offset: 4
- Brady Haran and Matt Parker, Brady Numbers, Numberphile video (2014).
-
b[1] = 2308; b[2] = 4261; b[n_] := b[n] = b[n-1] + b[n-2]; a[n_] := Block[ {k=1}, While[ IntegerLength[b@k] <= n, k++]; b[k-1]]; a /@ Range[4, 21] (* Giovanni Resta, Sep 24 2018 *)
Showing 1-2 of 2 results.
Comments