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A103972
Expansion of (1-sqrt(1-4x-20x^2))/(2x).
+0
2
1, 6, 12, 60, 264, 1392, 7392, 41424, 236640, 1384512, 8224896, 49554816, 301884672, 1856878080, 11514915840, 71915838720, 451938731520, 2855705994240, 18132621772800, 115637702461440, 740356410961920
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Maintained by
N. J. A. Sloane
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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.
AT&T Labs Research
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