54150

Appears in sequences

• Coefficients in the expansion of C/B^2, in Watson's notation of page 106.at n=23A160461
• Integer averages of halves of first cubes of natural numbers (n^3)/2 for some n.at n=27A164579
• Number of -3..3 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having two, four, six, seven or eight distinct values for every i,j,k<=n.at n=5A211758
• Easter occurrences on March 22, March 23, ..., April 25 during a 5,700,000-year Gregorian Easter cycle.at n=1A224110
• Smallest area A of Heron triangles with sides (a, b, c) in arithmetic progression of the form b - d(n), b, b + d(n), where d(n) = A091998(n) = 12*n +- 1.at n=15A229098
• Triangle read by rows: a non-Riordan array serving as a counterexample to a conjecture about Riordan arrays.at n=39A235608
• Numbers A055744(n) such that for any k < n, A055744(k) and A055744(n) do not have all their prime factors in common.at n=21A256431
• Number of n X 4 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.at n=6A275561
• Number of 7Xn 0..2 arrays with no element equal to any value at offset (-2,0) (-1,2) or (0,-2) and new values introduced in order 0..2.at n=3A275570
• Numbers k such that 6*k + 1 is a prime that can be written as p*q + 2, with p and q being consecutive primes.at n=19A342564