43401
domain: N
Appears in sequences
- Numbers k such that 4^k - 2^k - 1 is prime.at n=33A098845
- Number of compositions of n into pairwise relatively prime parts.at n=24A101268
- Indices of primes in sequence defined by A(0) = 43, A(n) = 10*A(n-1) + 53 for n > 0.at n=16A101735
- Number of proper divisors of n-th even perfect number.at n=24A133033
- Binomial transform of [1, 5, 15, 35, 70, 0, 0, 0, ...].at n=12A143132
- Row sums of triangle A145373 (S1hat(-5)) and partition array A145372 (M31hat(-5)).at n=8A145374
- Primitive (squarefree) elements of A199745.at n=33A200145
- Number of (w,x,y,z) with all terms in {1,...,n} and w+x<=y+z.at n=17A212560
- Squarefree products of k primes that are symmetrically distributed around their average. Case k = 4.at n=20A294751
- a(n) = (1/24)*n*(n - 1)*(n - 3)*(n - 14).at n=37A319930
- Number of connected 2n-regular loopless multigraphs with five nodes.at n=23A324221