0,2

Row sum(n+1) = (-1)^(n)*2*(n+1)!*Row sum(n) with Row sum(n=0) = 1.

Row sums of A156925.

Sequence in context: A009752 A137704 A001417 this_sequence A001697 A006069 A052457

Adjacent sequences: A156923 A156924 A156925 this_sequence A156927 A156928 A156929

easy,sign

Johannes W. Meijer (meijgia(AT)hotmail.com), Feb 20 2009