77689

Properties

Appears in sequences

• Bond percolation series for square lattice.at n=20A006727
• a(n) = Sum_{1 <= x, y <= n} lcm(x, y).at n=24A064951
• Primes of the form k^4 - (k+1)^3.at n=8A087191
• Expansion of (1-x)^2/((1-x)^3 - 4*x^3).at n=13A097123
• Primes with digit sum = 37.at n=25A106771
• Number of prime implicants of the Y function of order n.at n=8A134952
• a(n) = n^4 - (n+1)^3.at n=17A178617
• Prime numbers followed by two consecutive numbers which are products of four distinct primes (or tetraprimes).at n=31A362578
• Sum of binary ranks of all strict integer partitions of n, where the binary rank of a partition y is given by Sum_i 2^(y_i-1).at n=16A372888
• The number of perimeter-magic pentagons of order 3 with magic sum n.at n=20A380963
• Prime numbersat n=7635