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A008565
Digits of powers of 4.
2
1, 4, 1, 6, 6, 4, 2, 5, 6, 1, 0, 2, 4, 4, 0, 9, 6, 1, 6, 3, 8, 4, 6, 5, 5, 3, 6, 2, 6, 2, 1, 4, 4, 1, 0, 4, 8, 5, 7, 6, 4, 1, 9, 4, 3, 0, 4, 1, 6, 7, 7, 7, 2, 1, 6, 6, 7, 1, 0, 8, 8, 6, 4, 2, 6, 8, 4, 3, 5, 4, 5, 6, 1, 0, 7, 3, 7, 4, 1, 8, 2, 4, 4, 2, 9, 4, 9, 6, 7, 2, 9, 6, 1, 7, 1, 7, 9, 8, 6, 9, 1, 8, 4
OFFSET
0,2
COMMENTS
Irregular table with row length sequence A210434. - Jason Kimberley, Nov 26 2012
LINKS
Robert Israel, Table of n, a(n) for n = 0..10008 (rows 0 to 181, flattened)
EXAMPLE
Triangle begins:
1;
4;
1, 6;
6, 4;
2, 5, 6;
1, 0, 2, 4;
4, 0, 9, 6;
1, 6, 3, 8, 4;
6, 5, 5, 3, 6;
2, 6, 2, 1, 4, 4;
1, 0, 4, 8, 5, 7, 6;
...
MAPLE
R:= 1: t:= 1: count:= 1:
while count < 100 do
t:= 4*t; L:= convert(t, base, 10);
count:= count+nops(L);
R:= R, op(ListTools:-Reverse(L));
od:
R; # Robert Israel, May 05 2020
MATHEMATICA
Table[IntegerDigits[4^i], {i, 0, 17}]//Flatten (* Stefano Spezia, Aug 06 2024 *)
CROSSREFS
Cf. A000302 (powers of 4), A210434.
Last elements of rows give A168428.
Sequence in context: A110312 A011242 A371498 * A205325 A021100 A021028
KEYWORD
nonn,base,easy,tabf
STATUS
approved