203456

Appears in sequences

• a(n) = n*(n+1)*(n+2)^2/6.at n=32A004320
• a(n) = a(n-2) * a(n-3) + a(n-3), n>3. a(1) = a(2) = a(3) = 1.at n=13A079069
• Records in A086068.at n=21A086069
• Partial sums of squares of Catalan numbers (A000108).at n=7A094639
• a(n) = (n+1)^2 * (n+2)^2 * (2*n+3) / 12.at n=15A108674
• a(n) is the smallest number greater than a(n-1) such that in a(1) through a(n) no digit occurs more than once more than any other digit, starting with a(1) = 1.at n=49A248651
• a(n) = n*(1 - (-1)^n - 2*(3 + (-1)^n)*n^2 + 2*n^4)/384.at n=33A350689