75775

Appears in sequences

• Permutation of N induced by rotating the node 5 left in the infinite planar binary tree shown at A065658.at n=37A065669
• Triangle read by rows: T(n,k) = t(n,k) + t(n,n-k), where t(n,k) = 2*(n!/k!)*(2*(n + k) - 1).at n=29A154987
• Triangle read by rows: T(n,k) = t(n,k) + t(n,n-k), where t(n,k) = 2*(n!/k!)*(2*(n + k) - 1).at n=34A154987
• a(n) = 74*n^2 - 1.at n=31A158744
• a(n) = 37*2^(n-1)-1.at n=11A171390
• Numbers whose digits are prime and which retain this property when multiplied by some 1-digit prime (i.e., one of 2, 3, 5 or 7).at n=28A227922
• E.g.f.: log(1-x)*LambertW(-x).at n=7A277482
• Number of squarefree parts in the partitions of n into 10 parts.at n=46A309464
• a(n) = 2*a(n-1) + 1 for a(n-1) not prime, otherwise a(n) = prime(n) - 1; with a(1) = 147.at n=9A375155
• Numbers k such that the odd part of (1+k) divides (1 + odd part of A001615(k)), where A001615 is Dedekind's psi-function.at n=21A387415