57570
domain: N
Appears in sequences
- Numbers with no 1's in their base-3, base-4, and base-5 expansions. Intersection of A005823, A023709, and A023725.at n=27A117482
- a(n) = 64*n^2 - n.at n=29A157948
- a(n) = 256*n^2 - 2*n.at n=14A158249
- a(n) = 900*n^2 - 30.at n=7A158669
- The number of permutations p of {1,...,n} such that |p(i)-p(i+1)| is in {3,4} for all i from 1 to n-1.at n=32A174706
- Number of (w,x,y) with all terms in {0,...,n} and w != min(|w-x|, |x-y|, |y-w|).at n=38A213492
- Squarefree nonprimes n with a divisor d such that phi(n) divides n+d.at n=30A217741
- a(n) = 1*2*3*4 + 5*6*7*8 + 9*10*11*12 + 13*14*15*16 + 17*18*19*20 + ... + (up to n).at n=17A319205
- Numbers that are the sum of six fourth powers in six or more ways.at n=23A345563
- Numbers that are the sum of six fourth powers in exactly six ways.at n=18A345818