Number of permutations of [1..n] which are indecomposable by direct and skew sums.
A359856
Number of permutations of [1..n] which are indecomposable by direct and skew sums.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =0a(4) =2a(5) =22a(6) =202a(7) =1854a(8) =17866a(9) =183806a(10) =2029850a(11) =24081006a(12) =306486314a(13) =4175102110a(14) =60708557626a(15) =939518187726
External references
- oeis: A359856