A016101 (n! - n)/2 for even n.

0, 10, 357, 20156, 1814395, 239500794, 43589145593, 10461394943992, 3201186852863991, 1216451004088319990, 562000363888803839989, 310224200866619719679988, 201645730563302817791999987

Offset

1,2

References

George E. Andrews, Number Theory, Dover Publ., NY 1971, p. 39.

Links

Table of n, a(n) for n=1..13.

Mathematica

Table[(n! - n)/2, {n, 2, 30, 2}]

Crossrefs

Sequence in context: A217507 A217508 A217509 * A249847 A185255 A160523

Adjacent sequences: A016098 A016099 A016100 * A016102 A016103 A016104

Keyword

nonn

Author

Robert G. Wilson v

Status

approved