20742

Appears in sequences

• Numbers k such that 57*2^k + 1 is prime.at n=26A002274
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 48.at n=5A031726
• Number of UUU's in all skew Dyck paths of semilength n.at n=8A128721
• Triangle of numbers of walks in the quarter-plane, of length 2n beginning and ending at the origin using steps {(1,1), (1,0), (-1,0), (-1,-1)} (Gessel steps) arranged according to the number of times the steps (1,1) and (-1,-1) occur.at n=23A157513
• a(n) = 36*n^2 + 6.at n=23A158479
• Number of solutions to the Xqueens problem on an n X n board.at n=3A350611
• a(n) is the number of terms in row n of the array A378303.at n=24A378307