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A032939
Numbers whose base-4 representation Sum_{i=0..m} d(i)*4^(m-i) has d(i)=0 for all odd i.
1
1, 2, 3, 4, 8, 12, 16, 17, 18, 19, 32, 33, 34, 35, 48, 49, 50, 51, 64, 68, 72, 76, 128, 132, 136, 140, 192, 196, 200, 204, 256, 257, 258, 259, 272, 273, 274, 275, 288, 289, 290, 291, 304, 305, 306, 307, 512, 513, 514, 515, 528, 529
OFFSET
1,2
LINKS
MAPLE
f:= proc(n, j) local L, m;
L:= convert(n, base, 4);
m:= nops(L);
j*add(L[i+1]*4^(2*i), i=0..m-1)
end proc:
seq(seq(seq(f(n, j), n=4^k..4^(k+1)-1), j=[1, 4]), k=0..3)
CROSSREFS
Sequence in context: A283659 A355441 A344301 * A366201 A030073 A115271
KEYWORD
nonn,base
EXTENSIONS
Definition corrected by Robert Israel, Nov 15 2020
STATUS
approved