208335

Appears in sequences

• Triangle of Gaussian (or q-binomial) coefficients for q = -2.at n=48A015109
• Triangle of Gaussian (or q-binomial) coefficients for q = -2.at n=51A015109
• Gaussian binomial coefficient [ n,3 ] for q = -2.at n=6A015266
• Gaussian binomial coefficient [ n,6 ] for q = -2.at n=3A015323
• Numbers that are simultaneously triangular and square pyramidal.at n=4A039596
• a(1) = 0, then smallest triangular number such that a(n+1)- a(n) is a palindrome.at n=33A075057
• z-value of the solution (x,y,z) to 3/(2n+1) = 1/x + 1/y + 1/z satisfying 0 < x < y < z, odd x, y, z and having the largest z-value. The x and y components are in A075260 and A075261.at n=19A075262
• Square array of numbers associated to the recurrences b(k) = b(k-1) + n*b(k-2); array T(n,k), read by descending antidiagonals, for n, k >= 0.at n=38A110112
• Binomial(prime(n),s)/prime(n) where s is the sum of the decimal digits of n.at n=39A176266
• a(n) = 1*3*5 + 3*5*7 + 5*7*9 + ... (n terms).at n=17A196506
• Triangular numbers that are palindromes in base 7.at n=12A350992
• Semiperimeter of the unique primitive Pythagorean triple whose inradius is A000032(n) and such that its long leg and its hypotenuse are consecutive natural numbers.at n=12A380823