23471

Appears in sequences

• Starting positions of strings of three 3's in the decimal expansion of Pi.at n=13A083610
• Output of the linear congruential pseudo-random number generator used in function rand() as described in Kernighan and Ritchie, when seeded with 0.at n=23A096554
• Positive integers k for which 1 + 5*2^(k+2) divides the Fermat number 1 + 2^2^k.at n=5A103478
• Number of binary strings of length n with no substrings equal to 0001 or 1010.at n=14A164399
• E.g.f. satisfies: A(x) = Sum_{n>=0} AGM(1, A(x)^(4n))*x^n/n!, where AGM(x,y) is the arithmetic-geometric mean of Gauss.at n=5A172493
• E.g.f. satisfies: A(x) = exp(x*A(x)) - exp(x*A(x)^2) + exp(x*A(x)^3).at n=5A195513
• Numbers with 3 or more prime factors (with multiplicity) such that every concatenation of their prime factors is prime.at n=28A217264
• Number of (n+2) X (7+2) 0..4 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=7A252960
• Numbers m such that 6m+1, 12m+1, 18m+1, 36m+1 and 72m+1 are all prime.at n=18A257035
• Number of 2 X 2 matrices with all terms in {-n,..,0,..,n} and (sum of terms) = determinant.at n=23A281194
• Number of non-condensed integer partitions of n into parts > 1.at n=50A370804