A104008 Area of (m,m+1,m+1)-integer triangle for m in A103975.

120, 25080, 4890480, 949077360, 184120982760, 35718589344360, 6929223155685600, 1344233586759971040, 260774386791383159640, 50588886806491889178840, 9813983266108156439587920, 1903862164738670605583434320, 369339445976042880280120411080

Offset: 1

Author

Zak Seidov, Feb 24 2005

Keywords

• nonn
• easy

Links

• Index entries for linear recurrences with constant coefficients, signature (208, -2718, 208, -1).

Crossrefs

Cf. A103975.

Programs

Mathematica

LinearRecurrence[{208,-2718,208,-1},{120,25080,4890480,949077360},20] (* Harvey P. Dale, Mar 06 2017 *)

Formula

a(n) = (m/4)*sqrt((3*m+2)*(m+2)), where m=A103975(n).

G.f.: 120*x*(x+1) / ((x^2-194*x+1)*(x^2-14*x+1)). - Colin Barker, Apr 10 2013

Extensions

More terms from Max Alekseyev, May 31 2007

More terms from Colin Barker, Apr 10 2013