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Number of ways in which n can be the longer leg (middle side) of an integer-sided right triangle.
3

%I #6 Dec 11 2019 23:40:24

%S 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,

%T 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,

%U 0,1,0

%N Number of ways in which n can be the longer leg (middle side) of an integer-sided right triangle.

%F a(n) = A046079(n) - A056138(n) = A046081(n) - A046080(n) - A056138(n).

%Y Cf. A009023, A055523.

%K nonn

%O 1,12

%A _Henry Bottomley_, Jun 15 2000