Number of permutations of [n] with exactly n (possibly overlapping) occurrences of the generalized pattern 13-2 (alternatively: 2-13, 2-31, or 31-2).
A287328
Number of permutations of [n] with exactly n (possibly overlapping) occurrences of the generalized pattern 13-2 (alternatively: 2-13, 2-31, or 31-2).
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =2a(7) =42a(8) =716a(9) =11115a(10) =166144a(11) =2440438a(12) =35573362a(13) =517145226a(14) =7517489564a(15) =109427233994
External references
- oeis: A287328