OFFSET
1,1
REFERENCES
Carlier, Jacques; and Lucet, Corinne; A decomposition algorithm for network reliability evaluation. In First International Colloquium on Graphs and Optimization (GOI), 1992 (Grimentz). Discrete Appl. Math. 65 (1996), 141-156.
FORMULA
There is an explicit formula in the reference (see p. 152).
PROG
(PARI) a(n) = sum(j=1, k, stirling(k, j, 2)*2^(j)) \\ Michel Marcus, Apr 25 2013
CROSSREFS
KEYWORD
dead
STATUS
approved