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A253261 Odd Brazilian squares. 2
81, 121, 225, 441, 625, 729, 1089, 1225, 1521, 2025, 2401, 2601, 3025, 3249, 3969, 4225, 4761, 5625, 5929, 6561, 7225, 7569, 8281, 8649, 9025, 9801, 11025, 12321, 13225, 13689, 14161, 14641, 15129, 15625, 16641, 17689, 18225, 19881, 20449, 21025, 21609, 23409, 24025, 25281, 25921, 27225, 28561 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

121 is believed to be the only number of the form p^2 for prime p.

The previous comment conjectures the 1 and the 121 are the only difference with respect to A062532. - R. J. Mathar, Jul 25 2015

LINKS

Table of n, a(n) for n=1..47.

PROG

(PARI) for(n=4, 10^5, for(b=2, n-2, d=digits(n, b); if(vecmin(d)==vecmax(d)&&(n+1)%2==0&&issquare(n), print1(n, ", "); break)))

CROSSREFS

Cf. A125134, A257521.

Sequence in context: A039546 A223020 A357168 * A280587 A273372 A053887

Adjacent sequences:  A253258 A253259 A253260 * A253262 A253263 A253264

KEYWORD

nonn,base

AUTHOR

Derek Orr, Apr 30 2015

STATUS

approved

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Last modified September 28 17:45 EDT 2022. Contains 357080 sequences. (Running on oeis4.)