OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..10000
FORMULA
a(n) >= n with equality iff n belongs to A007088. - Rémy Sigrist, May 17 2019
MAPLE
a:= n-> (s-> parse(cat(seq(parse(s[i])^2, i=1..length(s)))))(""||n):
seq(a(n), n=0..70); # Alois P. Heinz, Jul 04 2014
MATHEMATICA
Table[FromDigits[Flatten[IntegerDigits/@(IntegerDigits[n]^2)]], {n, 0, 80}] (* Harvey P. Dale, May 06 2019 *)
PROG
(Magma) [0] cat [StringToInteger(&cat[IntegerToString(h): h in Reverse([i^2: i in Intseq(n)])]): n in [1..55]]; // Bruno Berselli, Jul 31 2012
(Python)
def digits(n):
d=[]
while n>0:
d.append(n%10)
n=n//10
return d
def sqdig(n):
new=0
num=digits(n)
spacing=0
while num:
k=num.pop(0)
new+=(10**(spacing))*(k**2)
if k>3:
spacing+=1
spacing+=1
return new
# David Nacin, Aug 19 2012
(Haskell)
a048385 0 = 0
a048385 n = read (show (a048385 n') ++ show (m ^ 2)) :: Integer
where (n', m) = divMod n 10
-- Reinhard Zumkeller, Jul 08 2014
(PARI) a(n) = if (n, fromdigits(concat(apply(d -> my (d2=d^2); if (d2, digits(d2), [0]), digits(n)))), 0) \\ Rémy Sigrist, May 17 2019
(MATLAB) m=1;
for u=0:200 digit=dec2base(u, 10)-'0'; digitp=digit.^2;
sol(m)=str2num(strrep(num2str(digitp), ' ', '')); m=m+1;
end
sol % Marius A. Burtea, May 17 2019
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Mar 15 1999
STATUS
approved