OFFSET
1,2
COMMENTS
LINKS
V. Shevelev, Several results on sequences which are similar to the positive integers, arXiv:0904.2101 [math.NT], 2009.
PROG
(Maxima) A220092(n):=((2*n-1)!!+(-1)^((n-1)*(n-2)/2))/2$ makelist(A220092(n), n, 1, 15); /* Martin Ettl, Dec 13 2012 */
CROSSREFS
KEYWORD
nonn
AUTHOR
Michel Marcus, Dec 11 2012
STATUS
approved