Number of adjacent pairs of form (odd,odd) among all permutations of {1,2,...,n}.
A077611
Number of adjacent pairs of form (odd,odd) among all permutations of {1,2,...,n}.
Terms
- a(0) =0a(1) =0a(2) =4a(3) =12a(4) =144a(5) =720a(6) =8640a(7) =60480a(8) =806400a(9) =7257600a(10) =108864000a(11) =1197504000a(12) =20118067200a(13) =261534873600
External references
- oeis: A077611