43608

Appears in sequences

• Expansion of x/(1 - 8*x - 5*x^2).at n=6A015575
• Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite BEA = Beta Na7[Al7Si57O128] starting with a T6 atom.at n=14A019072
• A unitary phi reciprocal amicable number: consider two different numbers r, s which satisfy the following equation for some integer k: uphi(r) = uphi(s) = (1/k) * r * s / (r-s); or equivalently, 1/uphi(r) = 1/uphi(s) = k * (1/s - 1/r); sequence gives k numbers.at n=42A080768
• a(n) = 1728*n - 1320.at n=25A157263
• Numbers k such that in a rotated-square spiral with positive integers (A215468) among k's eight nearest neighbors five or more are primes.at n=18A215471
• Number of (n+5)X7 0..1 matrices with each 6X6 subblock idempotent.at n=14A224571
• Irregular table read by rows: T(n, k) is the coefficient of x^k in the chromatic polynomial of the 1-skeleton of the n-dimensional cross polytope, 0 <= k <= 2n.at n=30A334279