The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A321595 Decimal expansion of the sum of the reciprocal of the Genocchi numbers (of first kind) with even index (negated). 0
 2, 8, 0, 5, 0, 4, 1, 4, 1, 7, 2, 5, 6, 5, 9, 8, 7, 8, 7, 7, 6, 8, 8, 7, 9, 4, 3, 1, 6, 3, 9, 9, 3, 3, 1, 7, 5, 8, 8, 5, 9, 6, 0, 4, 2, 3, 7, 5, 2, 6, 5, 9, 3, 9, 6, 5, 8, 2, 7, 8, 7, 0, 2, 7, 7, 8, 3, 8, 8, 3, 0, 4, 9, 1, 8, 2, 0, 4, 4, 8, 3, 9, 4, 6, 1, 6, 8, 7 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS If also the reciprocal of G(1) = 1 is added we get .7194958582743401212231... LINKS FORMULA Equals Sum_{k>0} 1/A036968(2*k). EXAMPLE -.28050414170674716801892095479922438557021976395598927505615374848326107452... MAPLE with(numtheory): P:=proc(h) local a, x, k, n; a:=[seq(factorial(n)*coeff(series(2*x/(1+exp(x)), x=0, h+1), x, n), n=1..h)]; print(evalf(add(1/a[2*k], k=1..trunc(h/2)), 200)); end: P(300); CROSSREFS Cf. A036968, A300220. Sequence in context: A160584 A191334 A251794 * A336405 A188924 A011055 Adjacent sequences:  A321592 A321593 A321594 * A321596 A321597 A321598 KEYWORD nonn,cons,easy AUTHOR Paolo P. Lava, Nov 14 2018 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 28 01:20 EDT 2020. Contains 337388 sequences. (Running on oeis4.)