373977
domain: N
Appears in sequences
- Numbers n such that n divides 2^n + 1.at n=34A006521
- Pseudo-powers to base 3: numbers k that are not powers of 3 such that k divides 2^k + 1.at n=22A016057
- Odd numbers divisible by exactly 10 primes (counted with multiplicity).at n=11A046323
- Number of primitive (period n) bracelet structures using exactly four different colored beads.at n=13A056368
- Binomial transform of n^2*2^n/2.at n=8A077616
- Triangle read by rows: T(n,k) = (-1)^k*3^(n-1-2k)*binomial(n-k,k)*(4n-5k)/(n-k) (0 <= k <= floor(n/2), n >= 1).at n=44A104063
- a(n) = (2n + 1)*3^n.at n=9A124647
- Triangle read by rows: T(n,k) is number of hex trees with n edges and k nonroot nodes of outdegree 2.at n=31A126183
- Number of hex trees with n edges and having no nonroot nodes of outdegree 2.at n=11A126184
- Binomial transform of 2^n, 2^n, 2^n.at n=16A137256
- a(n) = 19*3^n.at n=9A176413
- Row sums of A211230.at n=21A211231
- Terms k of A006521 such that 2*k is a term of A124240.at n=31A289257
- Odd exceptional numbers: odd k such that A005179(k) < A037019(k).at n=22A331613