cp's OEIS Frontend

A347144 a(n) is the smallest number whose square uses all the digits but n.

%I A347144 #12 Aug 21 2021 15:49:59
%S A347144 11826,45136,12586,32054,36137,10136,32861,32164,10124,10128
%N A347144 a(n) is the smallest number whose square uses all the digits but n.
%e A347144 a(0) is the smallest number whose square is a zeroless pandigital number. A071519 lists numbers whose squares are zeroless pandigital numbers. Thus, a(0) = A071519(1) = 11826 (11826^2 = 139854276).
%t A347144 Table[Select[Range[100000], Union[IntegerDigits[#^2]] ==  Delete[Range[0, 9], n + 1] &][[1]], {n, 0, 9}]
%o A347144 (Python)
%o A347144 def a(n):
%o A347144     k, target = 1, set(str(i) for i in range(10) if i != n)
%o A347144     while set(str(k*k)) != target: k += 1
%o A347144     return k
%o A347144 print([a(n) for n in range(10)]) # _Michael S. Branicky_, Aug 19 2021
%Y A347144 Cf. A071519, A158931.
%K A347144 nonn,base,fini,full
%O A347144 0,1
%A A347144 _Tanya Khovanova_, Aug 19 2021