12500000000
domain: N
Appears in sequences
- Denominator of Bernoulli(n, -3/10).at n=11A159012
- Number of (2+1) X (n+1) arrays of permutations of 0..n*3+2 with each element having index change +-(.,.) 0,0 1,0 or 1,2.at n=13A264273
- Triangle read by rows: T(n,k) is the number of labeled commutative magmas with n elements and k idempotents.at n=16A391482