5,1

a(n)= A053127(n)/2

a(n)= binomial(2*n-4, 5)/2 if n >= 5 else 0; G.f.: (x^5)*(3+10*x+3*x^2)/(1-x)^6.

Cf. A053127.

Sequence in context: A165393 A107651 A100019 this_sequence A048367 A095665 A145346

Adjacent sequences: A053129 A053130 A053131 this_sequence A053133 A053134 A053135

nonn,easy

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)