Expansion of the conjectured generating function for the number of "almost avoiding" permutations in the set Av(321)^{+1}.
A174193
Expansion of the conjectured generating function for the number of "almost avoiding" permutations in the set Av(321)^{+1}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =103a(6) =488a(7) =2320a(8) =10867a(9) =49971a(10) =225861a(11) =1005821a(12) =4423807a(13) =19255967a(14) =83093364a(15) =355956164a(16) =1515437339a(17) =6417727259a(18) =27054820649a(19) =113602953089a(20) =475370846639
External references
- oeis: A174193