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A050749 Squares containing no pair of consecutive equal digits. 2
0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 121, 169, 196, 256, 289, 324, 361, 484, 529, 576, 625, 676, 729, 784, 841, 961, 1024, 1089, 1296, 1369, 1521, 1681, 1764, 1849, 1936, 2025, 2304, 2401, 2601, 2704, 2809, 2916, 3025, 3136, 3249, 3481, 3721, 3969, 4096, 4356 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..49.

MATHEMATICA

Select[Range[0, 66]^2, FreeQ[Differences[IntegerDigits[#]], 0]&] (* Jayanta Basu, May 31 2013 *)

Select[Range[0, 100]^2, SequenceCount[IntegerDigits[#], {x_, x_}]==0&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Sep 08 2017 *)

CROSSREFS

Cf. A043096, A000290, A050741.

Sequence in context: A111704 A052041 A018884 * A096599 A016073 A115743

Adjacent sequences:  A050746 A050747 A050748 * A050750 A050751 A050752

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Sep 15 1999

STATUS

approved

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Last modified February 25 14:40 EST 2021. Contains 341609 sequences. (Running on oeis4.)