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A077440 Squares and their roots having square decimal digits. 1
0, 1, 100, 10000, 1000000, 1100401, 100000000, 110040100, 10000000000, 10100049001, 11004010000, 1000000000000, 1010004900100, 1100401000000, 100000000000000, 100100004990001, 101000490010000, 110040100000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..18.

EXAMPLE

a(6) = 1100401 = 1049^2; A019544(8)=441 is not a term, as 441=21^2 and 2 is not a square digit.

MATHEMATICA

a = {}; Do[d = FromDigits[ ReplaceAll[ IntegerDigits[n, 4], {3 -> 9, 2 -> 4}]]; If[ Union[ Join[ IntegerDigits[d^2], {0, 1, 4, 9}]] == {0, 1, 4, 9}, a = Append[a, d^2]], {n, 0, 3*10^4}]; a

CROSSREFS

a(n) = A077439(n)^2.

Cf. A019544, A000290, A046030.

Sequence in context: A192937 A029798 A029775 * A181412 A029794 A029801

Adjacent sequences:  A077437 A077438 A077439 * A077441 A077442 A077443

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Nov 06 2002

EXTENSIONS

Edited by Robert G. Wilson v, Nov 08 2002

STATUS

approved

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Last modified February 17 02:22 EST 2020. Contains 331976 sequences. (Running on oeis4.)