18577

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 30.at n=2A031618
• Denominators of continued fraction convergents to sqrt(349).at n=8A041661
• Integers n > 10553 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 10553.at n=14A063061
• Numbers n such that 2*11^n + 1 is prime.at n=9A141774
• Number of ways two L-tiles can be placed on an n X n square.at n=15A243645
• Those terms of A255571 whose every A080541/A080542-rotation is also a term of A255571.at n=29A258001
• Number of nX5 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 5 neighboring 1s.at n=5A297592
• T(n,k) = Number of n X k 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 5 neighboring 1s.at n=50A297595
• Number of 6Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 5 neighboring 1s.at n=4A297599
• Table where row n lists numbers N equal to the determinant of an n X n circulant having as a row the base n+1 digits of N.at n=42A303262
• Irregular table read by rows, T(n, k) is the rank of the k-th Seidel permutation of {1,...,n}, permutations sorted in lexicographical order.at n=31A347600
• The positive odd numbers x such that x = c^2 - y and +-x = a +- y, where (a,b,c) is a primitive Pythagorean triple (PPT), a is odd and y is an even positive integer.at n=30A357535