OFFSET
1,5
COMMENTS
a(n) is the truncation of (n! times the coefficient of x^n in the expansion of log(arcsin(x)/log(x+1))). ("Truncate" - this is Maple's definition - means "truncate a number to the next nearest integer towards 0".)
Computed by Sean A. Irvine, Aug 08 2018, in an attempt to explain the erroneous entry A013568.
LINKS
Robert Israel, Table of n, a(n) for n = 1..450
MAPLE
S:= series(log(arcsin(x)/log(1+x)), x, 31):
seq(trunc(coeff(S, x, n)*n!), n=1..30); # Robert Israel, Aug 10 2018
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Aug 10 2018, based on a suggestion from Sean A. Irvine, Aug 08 2018
EXTENSIONS
More terms and corrected comment from Robert Israel, Aug 10 2018
STATUS
approved