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!)
A051712 Numerator of b(n)-b(n+1), where b(n) = n/((n+1)(n+2)) = A026741/A045896. 5
0, 1, 1, 1, 1, 5, 1, 7, 1, 3, 5, 11, 1, 13, 7, 5, 2, 17, 3, 19, 5, 7, 11, 23, 1, 25, 13, 9, 7, 29, 5, 31, 4, 11, 17, 35, 3, 37, 19, 13, 5, 41, 7, 43, 11, 15, 23, 47, 2, 49, 25, 17, 13, 53, 9, 55, 7, 19, 29, 59, 5, 61, 31, 21, 8, 65, 11, 67, 17, 23, 35, 71, 3, 73 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

COMMENTS

b(n) = a(n+1) is multiplicative with b(2^e) = 1 if p = 2, b(3^e) = p^(e-1), 3, p^e if p >= 5.

LINKS

Table of n, a(n) for n=1..74.

M. Kaneko, The Akiyama-Tanigawa algorithm for Bernoulli numbers, J. Integer Sequences, 3 (2000), #00.2.9.

EXAMPLE

0, 1/60, 1/60, 1/70, 1/84, 5/504, 1/120, 7/990, 1/165, 3/572,...

CROSSREFS

Cf. A051713. Row 3 of table in A051714/A051715.

Sequence in context: A068328 A342918 A109375 * A086892 A284150 A318676

Adjacent sequences:  A051709 A051710 A051711 * A051713 A051714 A051715

KEYWORD

nonn,frac,easy,mult

AUTHOR

N. J. A. Sloane

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 May 23 16:11 EDT 2022. Contains 353976 sequences. (Running on oeis4.)