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A056137 Number of ways in which n can be the longer leg (middle side) of an integer-sided right 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 * A332602 A306383 A172099

Adjacent sequences:  A056134 A056135 A056136 * A056138 A056139 A056140

KEYWORD

nonn

AUTHOR

Henry Bottomley, Jun 15 2000

STATUS

approved

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Last modified September 23 12:02 EDT 2021. Contains 347613 sequences. (Running on oeis4.)