Number of permutations of 1..n with all sums of 2 through 6 adjacent terms respectively unique.
A147728
Number of permutations of 1..n with all sums of 2 through 6 adjacent terms respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =16a(4) =54a(5) =232a(6) =936a(7) =3880a(8) =17302a(9) =81584a(10) =409012a(11) =2138674a(12) =11754832a(13) =66857094a(14) =399774882a(15) =2469567300a(16) =15804526682
External references
- oeis: A147728