21818
domain: N
Appears in sequences
- Period of the continued fraction for sqrt(3^(2n+1)).at n=8A064932
- Boyd's Pisot-like sequence F(0,5,11).at n=20A274946
- Intersection of A003052 and A283002.at n=36A283003
- Number of nX3 0..1 arrays with every element equal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=16A300367
- Number of integer partitions of n whose product is divisible by the sum of primes of their parts.at n=50A330954
- Number of compositions of n matching the pattern (2,1,2).at n=16A335472
- Indices of records in A360519.at n=49A361108