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A125006 Numbers n for which nontrivial positive magic squares with magic sum n exist. For a definition of nontrivial positive magic squares, see A125005. 12
15, 18, 21, 24, 27, 30, 33, 34, 36, 38, 39, 42, 45, 46, 48, 50, 51, 54, 57, 58, 60, 62, 63, 65, 66, 69, 70, 72, 74, 75, 78, 80, 81, 82, 84, 85, 86, 87, 90, 93, 94, 95, 96, 98, 99, 100, 102, 105, 106, 108, 110, 111, 114, 115, 117, 118, 120, 122, 123, 125, 126, 129, 130 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

This sequence lists all values s such that A125005(s) > 0.

EXAMPLE

a(1) = 15 because 15 is the smallest integer s for which a nontrivial positive magic square with magic sum s exists.

CROSSREFS

Cf. A125005, A125007, A125008, A125009, A125010, A125011, A125012, A125013, A125014, A125015, A125016, A125017.

Sequence in context: A067757 A063779 A063781 * A125008 A114962 A083823

Adjacent sequences:  A125003 A125004 A125005 * A125007 A125008 A125009

KEYWORD

easy,nonn

AUTHOR

Jens Voss (jens(AT)voss-ahrensburg.de), Nov 15 2006

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Last modified February 16 20:35 EST 2012. Contains 205962 sequences.