1,2

7*C(n + 2, 4) + C(n + 1, 2).

G.f.:(-1-x^2-5*x)/(x-1)^5 [From Maksym Voznyy (voznyy(AT)mail.ru), Aug 10 2009]

Sequence in context: A016082 A003355 A022278 this_sequence A102784 A061003 A048879

Adjacent sequences: A006320 A006321 A006322 this_sequence A006324 A006325 A006326

nonn,easy

Albert Rich (Albert_Rich(AT)msn.com)