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 A207528 Decimal expansion of 4th Du Bois Reymond constant. 7
 0, 0, 5, 2, 4, 0, 7, 0, 4, 6, 7, 7, 7, 0, 4, 7, 7, 1, 1, 4, 8, 5, 6, 8, 9, 2, 0, 0, 7, 0, 1, 0, 5, 8, 9, 3, 7, 5, 8, 6, 8, 4, 3, 4, 4, 5, 5, 0, 8, 3, 4, 9, 2, 8, 6, 8, 4, 7, 6, 0, 3, 3, 3, 5, 5, 7, 9, 2, 0, 8, 6, 4, 4, 5, 2, 4, 5, 4, 8, 0, 3, 5, 1, 7, 4, 6, 6, 3, 2, 7, 7, 0, 3, 5, 3, 0, 8 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 REFERENCES S. R. Finch, Mathematical Constants, Cambridge, 2003, pp. 237-239. LINKS Eric W. Weisstein, MathWorld: Du Bois Reymond Constants. FORMULA 2 sum(k = 1..infinity) (1 + (x_k)^2)^(-2) = (e^4 - 4e^2 - 25)/8, where x_k is the k-th root of t = tan t and e is the natural logarithm base (approx. 2.71828). EXAMPLE 0.0052407046777047711... MATHEMATICA RealDigits[(E^4 - 4E^2 - 25)/8, 10, 100][[1]] CROSSREFS Cf. A138730 (continued fraction expansion). Cf. A062546 (c2), A224196 (c3), A243108 (c5), A245333 (c6). Sequence in context: A277581 A307381 A256167 * A019901 A187059 A267120 Adjacent sequences:  A207525 A207526 A207527 * A207529 A207530 A207531 KEYWORD nonn,cons AUTHOR Alonso del Arte, Feb 24 2012 STATUS approved

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Last modified June 4 07:43 EDT 2020. Contains 334822 sequences. (Running on oeis4.)