Triangle read by rows: number of circular permutations of [1..n] with k modular progressions of rise 1, distance 1 and length 3 (n >= 3, 0 <= k <= n).
A216722
Triangle read by rows: number of circular permutations of [1..n] with k modular progressions of rise 1, distance 1 and length 3 (n >= 3, 0 <= k <= n).
Terms
- a(0) =1a(1) =0a(2) =0a(3) =1a(4) =5a(5) =0a(6) =0a(7) =0a(8) =1a(9) =18a(10) =5a(11) =0a(12) =0a(13) =0a(14) =1a(15) =95a(16) =18a(17) =6a(18) =0a(19) =0a(20) =0a(21) =1a(22) =600a(23) =84a(24) =28a(25) =7a(26) =0a(27) =0a(28) =0a(29) =1
External references
- oeis: A216722