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A093607
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Let b(0)=1; b(1)=1; b(n+2)=(pi^2/6+6/pi^2)*b(n+1)-b(n). a(n)=floor(b(n)).
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4
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1, 1, 2, 4, 7, 12, 20, 33, 54, 90, 148, 244, 401, 660, 1086, 1786, 2939, 4835, 7953, 13082, 21520, 35399, 58230, 95785, 157560, 259175, 426327, 701280, 1153559, 1897529, 3121310, 5134350, 8445667, 13892566, 22852355, 37590617, 61834088
(list; graph; refs; listen; history; internal format)
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