login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A047683 a(n) = 5^(2*n)*(5^(2*n)-1)*Bernoulli(2*n)/(2*n). 3
50, -3250, 968750, -635781250, 722480468750, -1257228613281250, 3104408581542968750, -10320446545227050781250, 44440884525382995605468750, -240617847532228950500488281250, 1599915691073966364860534667968750, -12816452064605408400845527648925781250 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

J. W. Milnor and J. D. Stasheff, Characteristic Classes, Princeton, 1974, p. 283.

LINKS

Andrew Howroyd, Table of n, a(n) for n = 1..100

Index entries for sequences related to Bernoulli numbers.

PROG

(PARI) a(n) = 5^(2*n)*(5^(2*n)-1)*bernfrac(2*n)/(2*n) \\ Andrew Howroyd, May 18 2020

CROSSREFS

Column 4 of A241066.

Row sums of even indexed rows of A211234.

Sequence in context: A239653 A223661 A224111 * A010564 A183689 A248205

Adjacent sequences:  A047680 A047681 A047682 * A047684 A047685 A047686

KEYWORD

sign

AUTHOR

N. J. A. Sloane

EXTENSIONS

Offset corrected by Andrew Howroyd, May 18 2020

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 1 16:27 EDT 2022. Contains 354973 sequences. (Running on oeis4.)