40293
domain: N
Appears in sequences
- Number of ways to partition n elements into pie slices of different sizes other than one.at n=43A032155
- Numbers k such that (k*(k+1)*(k+2)) / (k+(k+1)+(k+2)) is a palindrome.at n=17A032789
- Trajectory of 9 under map x->x + (x-with-digits-reversed).at n=7A033651
- Trajectory of 27 under map x->x + (x-with-digits-reversed).at n=6A033659
- Trajectory of 99 under map x->x + (x-with-digits-reversed).at n=5A033674
- Numbers k for which the quotient q(k)=(k+rev(k))/abs(k-rev(k)) is an integer.at n=18A087993
- Numbers n such that (10^n-1)^2-2 is prime.at n=8A100903
- Expansion of 1 / (1 - x - x^2 + x^3 - x^5 + x^15 - x^17 - x^18 + x^19 + x^20).at n=30A174650
- Number of permutations of 1..n with displacements restricted to {-7,-6,-5,-4,-3,0,1,2}.at n=13A189602
- Expansion of Product_{k>=0} 1/(1-x^(4*k+1))^3.at n=35A261632
- Number of idempotents in the Kauffman monoid K_n.at n=13A281438
- a(n) = Sum_{d|n} (-1)^(n/d+1)*d!.at n=7A321521
- Numbers k such that R(k)/k is of the form m/(m + 1), where R(k) is the digital reversal of k.at n=8A376260