24511

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 90 ones.at n=23A031858
• Binomial transform of [1, 1, 6, 6, 6, ...].at n=12A131066
• Number of n X n -2..2 arrays of 2X2 subblock diagonal sums minus antidiagonal sums for some (n+1)X(n+1) binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=3A227055
• Number of nX4 -2..2 arrays of 2X2 subblock diagonal sums minus antidiagonal sums for some (n+1)X5 binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=3A227058
• T(n,k)=Number of nXk -2..2 arrays of 2X2 subblock diagonal sums minus antidiagonal sums for some (n+1)X(k+1) binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=24A227060
• Main diagonal of Unlucky array: a(n) = A255543(n,n).at n=27A255549
• Numbers n such that phi(n) = 4*phi(n-1).at n=4A268126
• Euler elliptic Carmichael numbers for the elliptic curve y^2 = x^3 + 80.at n=13A290338
• Elliptic Carmichael numbers for the elliptic curve y^2 = x^3 + 80.at n=24A317174
• G.f.: Sum_{k>=1} (k^4 * x^(k^2) / Product_{j=1..k} (1 - x^j)).at n=31A333152