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A029993
Squares which are palindromes in base 7.
11
0, 1, 4, 16, 64, 100, 121, 400, 1024, 1600, 2500, 3249, 4096, 6400, 25600, 40000, 118336, 160000, 250000, 302500, 310249, 532900, 1000000, 1893376, 2050624, 3579664, 5769604, 6007401, 6250000, 7573504, 7845601, 11833600
OFFSET
1,3
LINKS
Patrick De Geest, Palindromic Squares
FORMULA
a(n) = A029992(n)^2. - Seiichi Manyama, Oct 16 2021
MATHEMATICA
pal7Q[n_]:=Module[{idn7=IntegerDigits[n, 7]}, idn7==Reverse[idn7]]; Select[Range[0, 3500]^2, pal7Q] (* Harvey P. Dale, Dec 15 2011 *)
CROSSREFS
Squares which are palindromes in base b: A029983 (b=2), A029985 (b=3), A029987 (b=4), A029989 (b=5), A029991 (b=6), this sequence (b=7), A029806 (b=8), A029995 (b=9), A002779 (b=10), A029997 (b=11), A029738 (b=12), A029999 (b=13), A030074 (b=14), A030075 (b=15), A029734 (b=16).
Cf. A029992.
Sequence in context: A001264 A307138 A114399 * A268066 A275123 A275217
KEYWORD
nonn,base
STATUS
approved