21762

Appears in sequences

• Numbers k such that 103*2^k+1 is prime.at n=15A032401
• Values of k such that the total number of 1's in the binary expansions of the first k integers is a multiple of k.at n=25A095376
• a(n) = n*(2*n^2 + 5*n + 19)/2.at n=27A163675
• Third entry in row n of triangle in A169945.at n=22A169947
• Numbers m such that m = Sum_{i=x..y} i = (10^k)*y + x, where 0 <= x < y, 0 <= x < 10^k for some positive integers k.at n=6A186076
• Number of nX6 0..2 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.at n=1A280900
• T(n,k)=Number of nXk 0..2 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.at n=22A280902
• Number of 2Xn 0..2 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.at n=5A280903
• Numbers k such that the total number of consecutive runs of zeros of length m in every binary expansion from 1 to k, is even, for all m != floor(log_2(k)).at n=37A360320