22693

Appears in sequences

• Numbers k such that k^2 is palindromic in base 7.at n=45A029992
• Denominators of continued fraction convergents to sqrt(996).at n=15A042929
• a(n+4) = floor( ( a(n) + 2*a(n+1) + 3*a(n+2) + 4*a(n+3) )/5 ), with a(0), a(1), a(2), a(3) equal to 0, 1, 2, 3.at n=27A074733
• Positions of records in the continued fraction expansion of the prime constant.at n=13A103313
• Indices of increasing partial quotients PQ_i of the continued fraction for the prime constant (A051006).at n=13A103518
• Integers k such that A166100(k)/A005408(k) is not an integer.at n=33A166101
• Centered 12-gonal numbers which are semiprimes, intersection of A003154 and A001358.at n=25A218172
• Number of nX2 0..1 arrays with no 1 equal to more than one of its horizontal and vertical neighbors.at n=8A282990
• T(n,k) is the number of n X k 0..1 arrays with no 1 equal to more than one of its horizontal and vertical neighbors.at n=46A282996
• Length of n-th iterate of the mapping 00->0010, 01->001, 10->011, starting with 00.at n=23A289010
• T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally or vertically adjacent to 0, 1 or 4 1s.at n=46A295275
• Squarefree semiprimes k such that k+1 is the product of three distinct primes and k+2 is the product of four distinct primes.at n=31A376352