Number of permutations of floor(i*8/7), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
A147931
Number of permutations of floor(i*8/7), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =16a(4) =54a(5) =232a(6) =936a(7) =5070a(8) =28658a(9) =170392a(10) =1087848a(11) =7171828a(12) =49584912a(13) =366964014a(14) =3450377582a(15) =32284315804
External references
- oeis: A147931