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A068864
a(1) = 1; a(n+1) is the smallest square not already in the sequence which differs from a(n) at every digit.
2
1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 225, 144, 256, 121, 289, 196, 324, 169, 400, 361, 484, 529, 441, 576, 625, 784, 676, 729, 841, 900, 1024, 961, 1089, 2116, 1225, 2304, 1156, 2025, 1296, 2401, 1369, 2500, 1444, 2209, 1521, 2704, 1681, 2809, 1764, 2601
OFFSET
1,2
COMMENTS
Has a distinctive but unusual graph. - N. J. A. Sloane, Mar 19 2024
LINKS
David A. Corneth, PARI program
EXAMPLE
144 follows 225 as the smallest square not included earlier and differing at every digit position with 225.
PROG
(PARI) \\ See PARI link
CROSSREFS
Sequence in context: A077487 A179334 A068867 * A068854 A111704 A052041
KEYWORD
nonn,base,look
AUTHOR
Amarnath Murthy, Mar 13 2002
EXTENSIONS
Edited by Larry Reeves (larryr(AT)acm.org), Oct 09 2003
STATUS
approved