Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A051229
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A051229 Bernoulli number B_{2n} has denominator 66. +0
4
5, 25, 85, 185, 235, 295, 305, 335, 355, 365, 395, 425, 505, 535, 635, 685, 695, 745, 815, 835, 925, 985, 995, 1115, 1135, 1145, 1285, 1315, 1345, 1385, 1415, 1445, 1475, 1525, 1535, 1555, 1565, 1585, 1655, 1675, 1735, 1765 (list; graph; listen)
OFFSET

1,1

COMMENT

From the Von Staudt-Clausen theorem, denominator(B_2n) = product of primes p such that (p-1)|2n.

REFERENCES

B. C. Berndt, Ramanujan's Notebooks Part IV, Springer-Verlag, see p. 75.

LINKS

T. D. Noe, Table of n, a(n) for n=1..1000

Index entries for sequences related to Bernoulli numbers.

CROSSREFS

Cf. A045979, A051222, A051225-A051230. Equals A051230/2.

Sequence in context: A147114 A131537 A147122 this_sequence A058919 A018212 A147274

Adjacent sequences: A051226 A051227 A051228 this_sequence A051230 A051231 A051232

KEYWORD

nonn,nice,easy

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

EXTENSIONS

More terms from Michael Somos.

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified December 6 11:04 EST 2009. Contains 170427 sequences.


AT&T Labs Research