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A109072 Number of decimal digits ( counted with multiplicity ) in n but not in n^2. 2
0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 2, 1, 2, 0, 1, 0, 1, 2, 1, 1, 1, 2, 2, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 0, 1, 1, 2, 2, 0, 1, 2, 2, 2, 0, 1, 2, 0, 0, 1, 0, 2, 1, 1, 1, 1, 2, 1, 0, 1, 0, 2, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 2, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,18

LINKS

Robert Israel, Table of n, a(n) for n = 0..10000

MAPLE

f:= proc(n) local L2;

L2:= convert(n^2, base, 10);

nops(remove(t -> member(t, L2), convert(n, base, 10)));

end proc:

map(f, [$0..200]); # Robert Israel, Feb 22 2017

MATHEMATICA

UnsortedComplement[x_List, y__List]:=Replace[x, Dispatch[(#\[RuleDelayed]Sequence[])&/@Union[y]], 1]; Table[Length[UnsortedComplement[IntegerDigits[n], IntegerDigits[n^2]]], {n, 0, 200}]

CROSSREFS

Cf. A076493 (number of common and distinct decimal digits of n and n^2).

Cf. A109071 (number of common decimal digits (counted with multiplicity) of n and n^2).

Sequence in context: A274888 A239702 A202084 * A100727 A064892 A236344

Adjacent sequences:  A109069 A109070 A109071 * A109073 A109074 A109075

KEYWORD

base,easy,nonn

AUTHOR

Zak Seidov, Jun 20 2005

STATUS

approved

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Last modified December 11 21:15 EST 2017. Contains 295919 sequences.