22849

Appears in sequences

• Strong pseudoprimes to base 43.at n=16A020269
• Short leg of primitive Pythagorean triangles having legs that add up to a square, sorted on hypotenuse.at n=30A089547
• Numbers k such that 13k = 6j^2 + 6j + 1.at n=34A106390
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, -1), (0, 1), (1, -1), (1, 0)}.at n=12A151397
• a(n) = Sum_{k=0..n} p(k)^2, where p(k) is the partition function A000041.at n=13A259399
• Remainder when sum of squares of the first n primes is divided by n-th square pyramidal number.at n=40A282282
• G.f. A(x) satisfies: A(x) = Sum_{k>=0} k!*x^k*A(x)^k/(1 + x)^(k+1).at n=8A307443
• a(n) = Sum_{k=1..n} binomial(2*n - 3*k + 1, n - k)*k/(n - k + 1).at n=11A319636
• MM-numbers of crossing set partitions.at n=26A324324
• Indices of records of A070266.at n=21A353243