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A062120 Numbers k such that k has sqrt(k) as its middle digits. 1
1, 2500, 3600, 62500, 14379264, 57760000, 141376000000, 245495475625, 390625000000, 943971582724, 4482669527413081, 8790937600000000, 31561776563446336, 10235319926865509025 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
a(n) = A062118(n)^2.
MATHEMATICA
Do[ If[ StringPosition[ ToString[n^2], ToString[n]] [[1, 1]] == (Ceiling[ Log[10, n^2] ] - Ceiling[ Log[10, n] ])/2 + 1, Print[n^2] ], {n, 1, 10^9} ]
CROSSREFS
Cf. A062118.
Sequence in context: A252315 A131523 A307764 * A220025 A253377 A253370
KEYWORD
nonn,base
AUTHOR
Brian Wallace (wallacebrianedward(AT)yahoo.co.uk), Jun 28 2001
STATUS
approved

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Last modified February 25 15:54 EST 2024. Contains 370332 sequences. (Running on oeis4.)