A060056 Nonzero numbers in expansion of ((tan(x))^4)/4! in (x^n)/n!.

1, 40, 2016, 135680, 11977856, 1351633920, 190346960896, 32769353973760, 6776471542235136, 1658320063181619200, 474140484461265944576, 156647023437347542794240, 59229231136268698009993216

Offset

0,2

Links

Table of n, a(n) for n=0..12.

Formula

a(n)=|A059419(4+2*n)|.

Crossrefs

A059419 (fourth column without zeros), A059420.

Sequence in context: A278729 A189550 A300116 * A223177 A140729 A003741

Adjacent sequences: A060053 A060054 A060055 * A060057 A060058 A060059

Keyword

nonn,easy

Author

Wolfdieter Lang, Mar 16 2001

Status

approved