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 A208233 First inverse function (numbers of rows) for pairing function A188568. 2
 1, 1, 2, 3, 2, 1, 1, 3, 2, 4, 5, 2, 3, 4, 1, 1, 5, 3, 4, 2, 6, 7, 2, 5, 4, 3, 6, 1, 1, 7, 3, 5, 4, 6, 2, 8, 9, 2, 7, 4, 5, 6, 3, 8, 1, 1, 9, 3, 7, 5, 6, 4, 8, 2, 10, 11, 2, 9, 4, 7, 6, 5, 8, 3, 10, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Boris Putievskiy, Rows n = 1..140 of triangle, flattened Boris Putievskiy, Transformations Integer Sequences And Pairing Functions arXiv:1212.2732 [math.CO] FORMULA a(n) =  max(i,j)*((-1)^i+1)/2-min(i,j)*((-1)^i-1)/2, if i>=j a(n) = -max(i,j)*((-1)^j-1)/2+min(i,j)*((-1)^j+1)/2, if i=j:    result= max(i, j)*((-1)**i+1)/2-min(i, j)*((-1)**i-1)/2 else:    result=-max(i, j)*((-1)**j-1)/2+min(i, j)*((-1)**j+1)/2 CROSSREFS Cf. A188568. Sequence in context: A321305 A026552 A333271 * A176270 A086437 A027907 Adjacent sequences:  A208230 A208231 A208232 * A208234 A208235 A208236 KEYWORD nonn AUTHOR Boris Putievskiy, Jan 10 2013 STATUS approved

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Last modified August 9 10:38 EDT 2020. Contains 336323 sequences. (Running on oeis4.)