50603

Appears in sequences

• Number of 5-tuples of different integers from [ 1,n ] with no common factors among triples.at n=28A015646
• Frobenius number of the numerical semigroup generated by three consecutive hexagonal numbers.at n=18A069758
• Number of times the n-th prime appears among the decimal digits of 2^(2^n) + 1, the Fermat numbers.at n=23A078671
• Number of binary strings of length n with equal numbers of 001 and 101 substrings.at n=18A164144
• Number of strings of numbers x(i=1..8) in 0..n with sum i*x(i)^4 equal to 8*n^4.at n=25A184852
• Binomial variation of the Catalan numbers: a(n) = sum( binomial(n-1-i, i)*a(i)*a(n-1-i), i=0..(n-1) ) with a(0)=1.at n=11A188478
• Numbers k such that (2*10^k - 41)/3 is prime.at n=23A280431