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 A097909 Decimal expansion of Sum_{i >= 1} t(i)/g(i), where t(i) = triangular number(i) and g(i) = (sum of first i primes)^4. 0
 0, 6, 8, 0, 5, 5, 9, 4, 0, 8, 1, 5, 2, 5, 7, 5, 6, 9, 3, 2, 6, 3, 1, 3, 6, 5, 1, 5, 1, 0, 0, 4, 6, 1, 5, 0, 2, 8, 8, 4, 4, 5, 9, 8, 9 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS FORMULA Equals Sum_{n>=1} A000217(n)/A007504(n)^4. - R. J. Mathar, Dec 07 2014 EXAMPLE 0.0680559408152575... MATHEMATICA p = s = 0; Do[p += Prime[n]; k = n*(n+1)/2; s += k/p^4; Print[N[s, 50]], {n, 10^6}] (* Ryan Propper, Jul 22 2006 *) CROSSREFS Cf. A000217, A007504. Sequence in context: A021151 A200116 A308314 * A143819 A021599 A072553 Adjacent sequences:  A097906 A097907 A097908 * A097910 A097911 A097912 KEYWORD cons,more,nonn AUTHOR Pierre CAMI, Sep 04 2004 EXTENSIONS Corrected and extended by Ryan Propper, Jul 22 2006 Offset corrected by R. J. Mathar, Jan 31 2009 More terms from Jon E. Schoenfield, Nov 17 2018 STATUS approved

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Last modified May 22 09:50 EDT 2022. Contains 353949 sequences. (Running on oeis4.)