19744
domain: N
Appears in sequences
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MEL = ZSM-11 Nan[AlnSi96-nO192] starting with a T3 atom.at n=13A019149
- Number of derangements of n elements with one pair repeated exactly once (e.g., "ABABCDEF").at n=5A140526
- G.f. A(x) satisfies A(x) = 1 + x*A(2*x)^6.at n=4A171206
- The number of simple permutations of length n which avoid 1243 and 2431.at n=16A226430
- Number of length n+3 0..5 arrays with no disjoint pairs in any consecutive four terms having the same sum.at n=2A247723
- T(n,k)=Number of length n+3 0..k arrays with no disjoint pairs in any consecutive four terms having the same sum.at n=23A247726
- Number of length 3+3 0..n arrays with no disjoint pairs in any consecutive four terms having the same sum.at n=4A247729
- Sum of the corners of a 2n+1 X 2n+1 square spiral.at n=34A325958