Harary, Frank On the notion of balance of a signed graph. (English) Zbl 0056.42103 Mich. Math. J. 2, 143-146 (1954). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 9 ReviewsCited in 290 Documents Keywords:Topology PDFBibTeX XMLCite \textit{F. Harary}, Mich. Math. J. 2, 143--146 (1954; Zbl 0056.42103) Full Text: DOI Online Encyclopedia of Integer Sequences: E.g.f.: A(x) = sqrt( Sum_{n>=0} 2^(n(n+1)/2) * x^n/n! ).