23877

Appears in sequences

• Differences between two positive cubes in exactly 2 ways.at n=14A014440
• Difference between two positive cubes in more than one way.at n=15A034179
• Number of partitions satisfying (cn(0,5) <= cn(2,5) = cn(3,5)).at n=51A036804
• Number of rooted identity trees with n nodes and 4 leaves.at n=13A055329
• Constant term of polynomial of degree n passing through the first n+1 consecutive prime-indexed primes.at n=13A082676
• Expansion of 1/(sqrt(1-5x)*sqrt(1-9x)).at n=5A104454
• Fourth differences of A129983.at n=13A129988
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, 0, 0), (0, -1, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.at n=10A148351
• Weight distribution of [63,45,7] primitive binary BCH code.at n=8A151772
• Numbers k such that 64*k^6 + 1091 is prime.at n=28A155809
• Numbers k such that k^3 divides 17^(k^2) + 1.at n=23A177817
• a(n) = n! * [x^n] exp((n+2)*x)*BesselI(0,2*x).at n=5A293491
• Positive numbers that are the sum of two (possibly negative) cubes in at least 2 ways (primitive solutions).at n=36A293647
• Sum of two (possibly negative) coprime cubes in at least 2 ways, but not the sum of 2 noncoprime cubes.at n=19A293648
• Numbers m such that there are precisely 19 groups of order m.at n=13A298910
• Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=4A299717
• Number of nX5 0..1 arrays with every element equal to 0, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=3A299718
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=31A299721
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero.at n=32A299721
• a(n) is the number of squares that have all digits distinct in base n.at n=12A376814