login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A056137 Number of ways in which n can be the longer leg (middle side) of an integer sided right angled triangle. 1
0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 3, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 2, 0, 0, 0, 2, 0, 1, 0, 1, 2, 0, 0, 3, 0, 0, 0, 1, 0, 0, 1, 2, 0, 0, 0, 4, 0, 0, 2, 1, 0, 0, 0, 1, 0, 1, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,12

LINKS

Table of n, a(n) for n=1..71.

FORMULA

a(n) = A046079(n)-A056138(n) = A046081(n)-A046080(n)-A056138(n)

CROSSREFS

Cf. A009023, A055523.

Sequence in context: A112609 A134363 A054015 * A306383 A172099 A170957

Adjacent sequences:  A056134 A056135 A056136 * A056138 A056139 A056140

KEYWORD

nonn

AUTHOR

Henry Bottomley, Jun 15 2000

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 20 22:05 EDT 2019. Contains 328291 sequences. (Running on oeis4.)