OFFSET
0,4
COMMENTS
Apart from initial terms and signs, identical to A000142.
a(n-1), n >= 0, is the negative of the alternating row sum of A048994 (Stirling1) with e.g.f. -1/(1+x). - Wolfdieter Lang, May 09 2017
LINKS
P. W. Anderson, D. J. Thouless, E. Abrahams and D. S. Fisher, New method for a scaling theory of localization, Physical Review B, 1980.
FORMULA
G.f.: -1-x+x^2/(G(0)+x) where G(k)= 1 + (k+1)*x/(1 + x*(k+2)/G(k+1)); (continued fraction, 2-step). - Sergei N. Gladkovskii, Aug 14 2012
G.f.: conjecture: T(0)*x^2/(1+2*x) - 1 - x, where T(k) = 1 - x^2*(k+1)*(k+2)/(x^2*(k+1)*(k+2) - (1+2*x*(k+1))*(1+2*x*(k+2))/T(k+1) ); (continued fraction). - Sergei N. Gladkovskii, Nov 19 2013
MATHEMATICA
p[x] = -(1 + 1/x)*Log[1 + x];
Table[ (n + 1)!*SeriesCoefficient[ Series[p[x], {x, 0, 30}], n], {n, 0, 30}]
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Roger L. Bagula, Jan 22 2009
EXTENSIONS
Edited by N. J. A. Sloane, Jun 02 2009
STATUS
approved