33367
domain: N
Appears in sequences
- a(n) = A000364(n) * (3^(2*n+1) + 1)/4.at n=3A002437
- Numbers whose square has its digits in nondecreasing order.at n=46A028819
- a(n) = A052217(n)/3.at n=38A088405
- Number of permutations which avoid the patterns 1324 and (2143 with Bruhat restriction {2<->3}). Also the number of permutations whose graphs are acyclic.at n=8A111053
- Number of intersections of a convex set with the n X n grid.at n=5A114531
- A bisection of A002437.at n=1A156169
- Integers n such that digits in n and n^2 are in nondecreasing order.at n=37A234841
- Numbers of the form (10^a + 10^b + 1)/3.at n=17A237424