51912

Appears in sequences

• Denominator of B(4n+2)/(8n+4) where B(m) are the Bernoulli numbers.at n=24A043304
• Thickened cube numbers: a(n) = n*(n^2 + (n-1)^2) + (n-1)*2*n*(n-1).at n=23A050492
• a(n) = A000166(n)*binomial(n+1,2).at n=7A065087
• Least k such that prime(n)^3 divides binomial(2k,k).at n=14A110496
• Numbers k such that A127483(k) = A127483(k+1) - 1 = A127483(k+2) - 2 = A127483(k+3) - 3.at n=9A127486
• a(1) = 1, a(2) = 7, a(n+2) = 7*a(n+1)+(n+1)*(n+3)*a(n).at n=5A142990
• T(n,k) is the number of partial bijections (or subpermutations) of an n-element set of height k (height(alpha) = |Im(alpha)|) and with exactly 2 fixed points.at n=26A144091
• Indices of "Pithagorean" (not Pythagorean!) triples with prime initial terms.at n=1A159464
• Triangle read by rows: T(n,k) is the number of permutations of [n] starting with 1, having no 3-sequences and having k successions (0 <= k <= floor(n/2)); a succession of a permutation p is a position i such that p(i +1) - p(i) = 1.at n=32A180186
• Permanent of the n-th principal submatrix of A204267.at n=7A204268
• Permanent of the n-th principal submatrix of A204425.at n=7A204426
• Permanent of the n-th principal submatrix of A204431.at n=7A204432
• a(n) = (n!/5!)*Sum(1/k!,k=1..n-5).at n=10A268220
• Numerator of sigma_3(n)/sigma_2(n).at n=46A298754
• a(n) is the number of ways to partition an n X n X n cube into four noncongruent cuboids of different volumes.at n=37A385580