OFFSET
1,1
COMMENTS
This sequence contains 124 terms, with a(124) = 9998956. - Giovanni Resta, Jun 06 2015
LINKS
Giovanni Resta, Table of n, a(n) for n = 1..124 (all terms)
EXAMPLE
31883334^2 = 1016546986955556;
1+0+1+6+5+4+6+9+8+6+9+5+5+5+5+6 = 81 = 9^2;
10+16+54+69+86+95+55+56 = 441 = 21^2;
1016+5469+8695+5556 = 20736 = 144^2;
10165469+86955556 = 97121025 = 9855^2.
MATHEMATICA
okQ[n_]:=Module[{n2=IntegerDigits[n^2]}, And@@(IntegerQ[Sqrt[ #]]&/@ (Total/@(Table[ FromDigits/@Partition[n2, 2^i], {i, 0, 3}])))]; Select[ Range[31622777, 38400000], okQ] (* Harvey P. Dale, Aug 12 2012 *)
CROSSREFS
KEYWORD
nonn,base,fini,full
AUTHOR
Doug Bell, Dec 31 2008
STATUS
approved