30504

Appears in sequences

• Star of David matchstick numbers: a(n) = 6*n*(3*n+1).at n=41A045946
• Sum{T(i,n-i): i=0,1,...,n}, array T as in A047030.at n=16A047031
• Sum of primes below Fibonacci(n).at n=15A211548
• Integers n such that 2n^2+1, 2n^3+1 and 2n^4+1 are prime.at n=26A239920
• Terms of A007504 divisible by 3.at n=35A249679
• Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum unequal to 4 or 5 and every diagonal and antidiagonal sum equal to 4 or 5.at n=4A251897
• Number of (n+2) X (5+2) 0..3 arrays with every 3 X 3 subblock row and column sum unequal to 4 or 5 and every diagonal and antidiagonal sum equal to 4 or 5.at n=4A251902
• Sum of squares of end-to-end distances for self-avoiding walks on the L lattice.at n=12A260778
• Number of length-n 0..7 arrays with no repeated value differing from the previous repeated value by other than plus or minus one modulo 7+1.at n=4A269677
• Number of length-5 0..n arrays with no repeated value differing from the previous repeated value by other than plus or minus one modulo n+1.at n=6A269680
• a(n) = 27*n^2 - 21*n + 6 (n>=1).at n=33A304164
• Lengths of the long leg in 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=10A386201