129520

Appears in sequences

• Number of involutions of length 2n which are invariant under the reverse-complement map and have no decreasing subsequences of length 8.at n=9A145870
• Let S denote the palindromes in the language {0,1,2,...,n-1}*; a(n) = number of words of length 4 in the language SS.at n=39A187277
• Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with seven.at n=6A292173
• Expansion of Product_{k>=1} ((1 + x^(2*k))/(1 - x^(2*k-1)))^k.at n=29A295831
• Number of permutations p of [2n+1] such that 0p has a nonincreasing jump sequence beginning with n+1.at n=6A303203
• Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with ceiling(n/2).at n=13A303204