OFFSET
1,2
COMMENTS
In more than one way: 554455, 9343439, ... (A267600) - Robert G. Wilson v, May 28 2012
LINKS
Giovanni Resta, Table of n, a(n) for n = 1..10400 (terms < 10^18, first 228 terms from Robert G. Wilson v)
EXAMPLE
1001 is in the sequence because 1001 is palindromic and it can be written as sum of consecutive squares (1001 = 4^2 + 5^2 + 6^2 + ... + 13^2 + 14^2).
MATHEMATICA
palQ[n_Integer] := Block[{idn = IntegerDigits[n]}, idn == Reverse[idn]]; lst = {}; k = 1; While[k < 1000, AppendTo[lst, Select[ Accumulate[ Range[k, 1000]^2], palQ]]; lst = Union@ Flatten@ lst; k++]; Select[lst, # < 10^6 &] (* Robert G. Wilson v, May 28 2012 *)
CROSSREFS
KEYWORD
nonn,easy,base
AUTHOR
Zhining Yang, Jan 19 2011
STATUS
approved