A229766 - OEIS

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A229766

Odd numbers whose square's binary reversal is also a square.

1, 3, 4523, 11991, 18197, 66075, 72225, 141683, 1092489, 3168099, 6001209, 6226335, 6435309, 12489657, 17906499, 50429883, 51928701, 68301841, 295742437, 390117873, 542959199, 554456167, 566494057

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OFFSET

1,2

COMMENTS

A003166 is a subsequence, except A003166(1)=0.

All odd numbers n such that A068527(A030101(n^2)) = 0. - Antti Karttunen, Dec 20 2013

LINKS

Table of n, a(n) for n=1..23.

FORMULA

a(n) = sqrt(A229687(n)).

PROG

(Scheme, with Antti Karttunen's IntSeq-library)

(define A229766 (MATCHING-POS 1 1 (lambda (n) (and (odd? n) (zero? (A068527 (A030101 (* n n))))))))

CROSSREFS

Cf. A000290, A003166, A030101, A068527, A229687.

Sequence in context: A024048 A094319 A362536 * A003166 A251603 A168556

Adjacent sequences: A229763 A229764 A229765 * A229767 A229768 A229769

KEYWORD

nonn,base

AUTHOR

Alex Ratushnyak, Dec 19 2013

STATUS

approved