23410

Appears in sequences

• Numbers k such that replacing each nonzero digit d with the d-th prime (replacing each 0 digit with a 1) yields a square.at n=8A048383
• Central coefficients of number triangle A113582.at n=17A154323
• a(n) = number of 8-digit primes with digit sum n, where n runs through the non-multiples of 3 in the range [2..71].at n=36A178879
• Number of Dyck n-paths all of whose ascents and descents have lengths equal to 1 (mod 6).at n=28A212365
• Let an integer with k+1 digits as n = d(k)*10^k + d(k-1)*10^(k-1) + ... + d(0)*10^0 and consider the transform T(n) = k*10^d(k) + (k-1)*10^d(k-1) + ... + 0*10^d(0). a(n) gives the fixed points of the transform T(n).at n=23A226767
• Numbers whose square is a fourth power plus a prime.at n=24A236767
• Numbers d > 1 such that the class number of Q(sqrt(d)) is strictly greater than the class number of Q(sqrt(m)) for all m < d.at n=12A283658
• Fibonacci with binary selection.at n=18A327665
• G.f. satisfies A(x) = A(x^3)/(A(x^2) - A(x^3)), with A(0) = 0, A'(0) = 1.at n=62A382317