100909
domain: N
Appears in sequences
- Number of 2-factors in D_4 X P_n.at n=8A003758
- a(n) = A077727(n)/n.at n=43A077728
- Number of nX5 0..1 arrays with every element unequal to 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.at n=11A303633
- Indices of Ennesrem primes: k such that A004094(k)-1 is prime.at n=8A341713