63503

Appears in sequences

• Lucas-Carmichael numbers: squarefree composite numbers k such that p | k => p+1 | k+1.at n=18A006972
• Squarefree numbers k with largest prime factor = floor(sqrt(k)).at n=38A071311
• Record numbers of A171063 nonzero period n solutions of x(i)=(x(i-1)+x(i-2)) mod m, as encountered in (n=1,m=1; n=1,m=2; n=2,m=1) antidiagonal order.at n=28A171061
• Record numbers of A171063 nonzero period n solutions of x(i)=(x(i-1)+x(i-2)) mod m, as encountered in (n=1,m=1; n=2,m=1; n=1,m=2) antidiagonal order.at n=29A171062
• a(n) = (8*n+3)*(8*n+5).at n=31A177065
• Lucas-Carmichael numbers with 3 prime factors.at n=13A216925
• Least common multiple of 7*n+1 and 7*n-1.at n=36A282286
• Euler elliptic Carmichael numbers for the elliptic curve y^2 = x^3 + 80.at n=23A290338
• Lucas-Carmichael numbers of the form k^2 - 1.at n=3A292538
• Elliptic Carmichael numbers for the elliptic curve y^2 = x^3 + 80.at n=37A317174
• Composite integers k such that sigma(k) | (k + 1)*tau(k) where tau is number of divisors of k.at n=17A384493