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A325741 First term of n-th difference sequence of (floor(Pi*k/2)), k >= 0. 2
1, 1, -2, 4, -8, 16, -32, 64, -127, 246, -456, 792, -1254, 1716, -1716, 1, 6418, -24156, 67080, -162924, 364608, -767976, 1535953, -2922702, 5273624, -8934120, 13904190, -18874260, 18874260, 1, -71705866, 272491892, -763189064, 1865459352, -4190875872 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
MATHEMATICA
Table[First[Differences[Table[Floor[(Pi/2)*n], {n, 0, 50}], n]], {n, 1, 50}]
CROSSREFS
Sequence in context: A258585 A235701 A054044 * A008859 A335247 A145113
KEYWORD
easy,sign
AUTHOR
Clark Kimberling, May 23 2019
STATUS
approved

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Last modified June 24 03:36 EDT 2024. Contains 373661 sequences. (Running on oeis4.)