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A077356
Squares whose external digits (MSD and LSD) form a square. Or squares from which deleting the internal digits leaves a square.
5
0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 196, 225, 841, 1156, 1296, 1936, 2025, 3136, 4489, 6084, 6724, 8281, 10816, 11236, 12996, 13456, 15376, 15876, 17956, 18496, 21025, 24025, 27225, 30276, 30976, 33856, 34596, 37636, 38416, 41209, 42849, 45369, 47089, 49729, 61504
OFFSET
1,3
LINKS
EXAMPLE
10816 = 104^2 is a term as deleting its internal digits (081) leaves 16, a square.
PROG
(PARI) lista(n)={my(L=List(), k=0); while(#L<n, my(x=k^2); if(x<100 || issquare(x\10^logint(x, 10)*10+x%10), listput(L, x)); k++); Vec(L)} \\ Andrew Howroyd, Sep 21 2024
CROSSREFS
Sequence in context: A052062 A052046 A078255 * A077357 A294497 A080160
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Nov 05 2002
EXTENSIONS
More terms from Erich Friedman, Aug 08 2005
0 inserted by Jon E. Schoenfield, Jan 15 2014
Offset changed and a(42) onwards from Andrew Howroyd, Sep 21 2024
STATUS
approved