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A054127
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a(1) = 2; a(n) = 9*2^(n-2) - n - 2, n>1.
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1
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2, 5, 13, 30, 65, 136, 279, 566, 1141, 2292, 4595, 9202, 18417, 36848, 73711, 147438, 294893, 589804, 1179627, 2359274, 4718569, 9437160, 18874343, 37748710, 75497445, 150994916, 301989859, 603979746, 1207959521
(list; graph; refs; listen; history; internal format)
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