139425

Appears in sequences

• Odd pentagonal pyramidal numbers.at n=16A015223
• a(n) = (n+1)*(2n+1)^2.at n=32A139757
• Numbers k such that k^3 +/- k +/- 1 are prime for all four possibilities.at n=9A236764
• Positive integers, c, such that there are more than two solutions to the equation a^2 + b^3 = c^4, with a, b > 0.at n=52A242381
• Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.at n=6A252429
• Number of (7+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.at n=3A252440
• Pentagonal pyramidal numbers divisible by 3.at n=43A299412
• a(n) = (8*n + 1)^2*(4*n + 1).at n=8A387684