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A048470
a(n)=(n+1)(2^(n+1)-n)/2.
+0
1
1, 3, 9, 26, 70, 177, 427, 996, 2268, 5075, 11209, 24510, 53170, 114597, 245655, 524168, 1113976, 2359143, 4980565, 10485570, 22019886, 46137113, 96468739, 201326316, 419430100, 872414907, 1811938977, 3758096006, 7784627818
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.
AT&T Labs Research
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