A068878 Nonzero denominators in the expansion of sin(x)+exp(x)-1-2x.

2, 24, 60, 720, 40320, 181440, 3628800, 479001600, 3113510400, 87178291200, 20922789888000, 177843714048000, 6402373705728000, 2432902008176640000, 25545471085854720000, 1124000727777607680000, 620448401733239439360000

Offset

1,1

Links

Table of n, a(n) for n=1..17.

Formula

a(3k+1)=(4k+2)!, a(3k+2)=(4k+4)!, a(3k+3)=(4k+5)!/2.

Crossrefs

Sequence in context: A079608 A257663 A292162 * A100918 A152965 A345692

Adjacent sequences: A068875 A068876 A068877 * A068879 A068880 A068881

Keyword

easy,nonn

Author

Benoit Cloitre, Mar 29 2002

Extensions

Name clarified by Sean A. Irvine, Mar 19 2024

Status

approved