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 A254445 Decimal expansion of Sum_{n>=0} 1/cosh(n). 3
 2, 0, 7, 1, 1, 2, 1, 3, 2, 9, 9, 6, 7, 8, 2, 3, 1, 6, 9, 5, 7, 1, 5, 7, 2, 9, 9, 2, 6, 8, 3, 5, 2, 6, 2, 6, 0, 8, 9, 3, 7, 9, 4, 6, 5, 8, 3, 0, 6, 9, 3, 0, 7, 5, 5, 8, 1, 5, 6, 5, 0, 6, 6, 1, 1, 1, 4, 4, 5, 1, 2, 2, 6, 6, 1, 2, 2, 6, 2, 9, 3, 7, 3, 2, 7, 1, 2, 5, 0, 0, 2, 2, 2, 9, 5, 0, 5, 2, 8, 5, 5, 6, 4, 6, 7 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..105. EXAMPLE 2.071121329967823169571572992683526260893794658306930755815650661114451... MAPLE evalf(sum(1/cosh(n), n = 0..infinity), 120); MATHEMATICA RealDigits[N[Re[Sum[1/Cosh[n], {n, 0, Infinity}]], 110], 10, 105][[1]] PROG (PARI) suminf(n=0, 1/cosh(n)) \\ Michel Marcus, Jan 30 2015 CROSSREFS Cf. A185393, A254446, A335415. Sequence in context: A156442 A268683 A174968 * A346670 A140663 A198108 Adjacent sequences: A254442 A254443 A254444 * A254446 A254447 A254448 KEYWORD nonn,cons AUTHOR Vaclav Kotesovec, Jan 30 2015 STATUS approved

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Last modified December 4 02:45 EST 2023. Contains 367541 sequences. (Running on oeis4.)