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A325743
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First term of n-th difference sequence of (floor(Pi*k/4)), k >= 0.
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2
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0, 1, -1, 1, -2, 6, -16, 36, -71, 126, -201, 276, -276, 0, 1014, -3744, 10179, -24309, 54126, -115614, 240444, -490104, 980209, -1918752, 3658449, -6750224, 11950524, -20058300, 31303782, -43733304, 49586229, -28048799, -67798986, 331797126, -932095976
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OFFSET
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1,5
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LINKS
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MATHEMATICA
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Table[First[Differences[Table[Floor[(Pi/4)*n], {n, 0, 50}], n]], {n, 1, 50}]
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CROSSREFS
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KEYWORD
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easy,sign
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AUTHOR
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STATUS
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approved
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