OFFSET
1,1
COMMENTS
For n >= 11, there is at most one Bell number with n digits. - Robert Israel, Mar 17 2019
LINKS
Robert Israel, Table of n, a(n) for n = 1..999
Eric Weisstein's World of Mathematics, Bell Number
EXAMPLE
Sum of all 1-digit Bell numbers is 9.
Sum of all 2-digit Bell numbers is 67.
Sum of all 3-digit Bell numbers is 1080.
MAPLE
N:= 80: # for a(1)..a(N)
A:= Vector(N):
for n from 0 do
b:= combinat:-bell(n);
k:= ilog10(b)+1;
if k > N then break fi;
A[k]:= A[k]+b;
od:
convert(A, list): # Robert Israel, Mar 17 2019
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Parthasarathy Nambi, Sep 18 2007
EXTENSIONS
More terms from Robert Israel, Mar 17 2019
STATUS
approved