|
|
A032940
|
|
Numbers whose base-5 representation Sum_{i=0..m} d(i)*5^(m-i) has d(i)=0 for all odd i.
|
|
1
|
|
|
1, 2, 3, 4, 5, 10, 15, 20, 25, 26, 27, 28, 29, 50, 51, 52, 53, 54, 75, 76, 77, 78, 79, 100, 101, 102, 103, 104, 125, 130, 135, 140, 145, 250, 255, 260, 265, 270, 375, 380, 385, 390, 395, 500, 505, 510, 515, 520, 625, 626, 627, 628, 629
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
LINKS
|
|
|
MAPLE
|
f:= proc(n, j) local L, m;
L:= convert(n, base, 5);
m:= nops(L);
j*add(L[i+1]*5^(2*i), i=0..m-1)
end proc:
seq(seq(seq(f(n, j), n=5^k..5^(k+1)-1), j=[1, 5]), k=0..2); # Robert Israel, Nov 15 2020
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|