22824

Appears in sequences

• The array described in A059513 read by antidiagonals in the 'up' direction.at n=30A059574
• The array described in A059513 read by antidiagonals in the direction of construction.at n=30A059575
• a(n) = 2*(n-1)*a(n-1) -(n-1)*a(n-2) with a(0)=0, a(1)=1.at n=7A108204
• Number of n X n X n triangular nonnegative integer arrays with all sums of an element and its neighbors <= 5.at n=4A166177
• Number of 4 X 4 X 4 triangular nonnegative integer arrays with all sums of an element and its neighbors <= n.at n=5A166190
• 3-comma numbers: n occurs in the sequence S[k+1]=S[k]+10*last_digit(S[k-1])+first_digit(S[k]) for three different splittings n=concat(S[0],S[1]).at n=25A166513
• Number of (6+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically.at n=12A253703
• Numbers k such that Bernoulli number B_{k} has denominator 140100870.at n=2A295599
• a(n) = Sum_{d|n} d^(2*n/d - 1).at n=14A308688
• Least k such that k*M(n)*M(n+4) + 1 is prime, where M(n) = A000668(n).at n=19A365065
• Expansion of e.g.f. exp(2*x) / (1 - x^3/6 * exp(x)).at n=8A375632