102407

Properties

Appears in sequences

• A symmetrical recursion triangular sequence: m=4; e(n,k,m)= (2* k + m - 1)e(n - 1, k, m) + (m*n - 2*k + 1 - m)e(n - 1, k - 1, m); t(n,k)=e(n, k, m) + e(n, n - k, m).at n=23A156233
• A symmetrical recursion triangular sequence: m=4; e(n,k,m)= (2* k + m - 1)e(n - 1, k, m) + (m*n - 2*k + 1 - m)e(n - 1, k - 1, m); t(n,k)=e(n, k, m) + e(n, n - k, m).at n=25A156233
• Numbers k such that 2^(k-1) == 1 + b*k (mod k^2), where b divides k - 2^p for some integer p >= 0 and 2^p <= b.at n=51A186884
• Primes p such that p+2, (p^2-1)/2+p and (p^2+3)/2+3*p are also prime.at n=29A352948
• Indices of records in A034058.at n=39A389569
• Prime numbersat n=9806