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 A372339 Decimal expansion of Sum_{k>=0} (-1)^k * (k+2) / ((k+1)*(2*k)!). 3
 1, 3, 0, 3, 8, 4, 8, 8, 8, 7, 2, 2, 0, 2, 1, 2, 1, 6, 5, 5, 0, 7, 8, 1, 4, 4, 6, 5, 5, 8, 9, 5, 2, 7, 8, 1, 0, 4, 4, 2, 0, 5, 7, 3, 8, 3, 4, 5, 0, 5, 0, 8, 8, 1, 4, 3, 5, 5, 7, 9, 5, 1, 8, 6, 1, 2, 7, 1, 2, 1, 9, 9, 3, 1, 0, 5, 8, 9, 4, 6, 3, 1, 4, 5, 1, 1 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Table of n, a(n) for n=1..86. FORMULA Equals -2 + 3*cos(1) + 2*sin(1). EXAMPLE 1.3038488872202121655078144655895278104420573... MATHEMATICA s = Sum[(-1)^k (k + 2)/((k + 1) (2 k)!), {k, 0, Infinity}] d = N[s, 100] First[RealDigits[d]] CROSSREFS Cf. A049469, A049470, A372338. Sequence in context: A154853 A139214 A010030 * A197270 A117940 A099093 Adjacent sequences: A372336 A372337 A372338 * A372340 A372341 A372342 KEYWORD nonn,cons AUTHOR Clark Kimberling, Apr 28 2024 STATUS approved

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Last modified August 5 17:52 EDT 2024. Contains 374954 sequences. (Running on oeis4.)