login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A347597 a(n) = Permanent(T(2*n + 1)) where T(n) is the tangent matrix defined in A346831. Bisection of A347598 (odd indices). 3
0, 2, -12, 230, -6936, 316682, -20359332, 1754340590, -195242324016, 27266796955922, -4669829301365052, 962523286888757750, -235056895264868039496, 67119429827860669710362 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..13.

CROSSREFS

Cf. A347598, A346831.

Sequence in context: A101712 A156484 A333447 * A009272 A013141 A013143

Adjacent sequences:  A347594 A347595 A347596 * A347598 A347599 A347600

KEYWORD

sign,more

AUTHOR

Peter Luschny, Sep 14 2021

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 7 07:55 EST 2021. Contains 349571 sequences. (Running on oeis4.)