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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A071409 Determinant of the n X n matrix m(i,j)=i^j+j^i. 0
2, 7, 80, 2692, -188160, 673763328, 53114341552128, 11442355482580107264, 101868843539003372580372480, -11188458083483956358422238173593600, 39367352051951445285669984261580278202368000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

If n==0 mod 5 a(n) < 0

LINKS

Table of n, a(n) for n=1..11.

PROG

(PARI) for(n=1, 20, print1(matdet(matrix(n, n, i, j, i^j+j^i)), ", "))

CROSSREFS

Sequence in context: A128293 A307291 A326262 * A232041 A135756 A263368

Adjacent sequences:  A071406 A071407 A071408 * A071410 A071411 A071412

KEYWORD

easy,sign

AUTHOR

Benoit Cloitre, May 28 2002

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 June 24 06:17 EDT 2021. Contains 345416 sequences. (Running on oeis4.)