a(n) is the permanent of the n X n symmetric matrix M(n) that is defined as M[i,j] = abs(i - j) if min(i, j) < max(i, j) <= 2*min(i, j), and otherwise 0.
A353453
a(n) is the permanent of the n X n symmetric matrix M(n) that is defined as M[i,j] = abs(i - j) if min(i, j) < max(i, j) <= 2*min(i, j), and otherwise 0.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =4a(6) =64a(7) =576a(8) =7844a(9) =63524a(10) =882772a(11) =11713408a(12) =252996564a(13) =5879980400a(14) =184839020672
External references
- oeis: A353453