A110956 a(n) = permanent of the n X n matrix M of zeros and ones defined as follows: if we concatenate the rows of M to form a vector v of length n^2, v_i = 0 if i is an entry from the sequence A045506 (inscribe 2 spheres of curvature 2 inside sphere of curvature -1, continue to inscribe spheres where possible; the sequence gives list of curvatures).

2, 6, 20, 0, 368, 2016

Offset

3,1

Links

Table of n, a(n) for n=3..8.

Crossrefs

Cf. A045506.

Sequence in context: A186770 A332406 A127942 * A298446 A393345 A364563

Adjacent sequences: A110953 A110954 A110955 * A110957 A110958 A110959

Keyword

nonn

Author

Simone Severini, Sep 26 2005

Status

approved