26733

Appears in sequences

• Number of corners, or planar partitions of n with only one row and one column.at n=22A006330
• a(n) = p^2 + p + 1 where p runs through the primes.at n=37A060800
• Numbers whose square is a zeroless pandigital number (i.e., use the digits 1 through 9 once).at n=24A071519
• z-value of the solution (x,y,z) to 3/(2n+1) = 1/x + 1/y + 1/z satisfying 0 < x < y < z, odd x, y, z and having the largest z-value. The x and y components are in A075260 and A075261.at n=26A075262
• Indices n such that the 3 X 3 matrix with components (row by row) prime(n+k), 0 <= k <= 8, has zero determinant.at n=31A117345
• Number of trapezoids, distinct up to congruence, on an n X n grid (or geoboard).at n=14A181945
• Numbers arising in computing the Turan function of cycles of length 4.at n=41A217004
• Numbers n such that phi(n) = phi(n+12) and n is not divisible by 2.at n=31A217141
• Numbers such that sigma(phi(tau(n)))=tau(phi(sigma(n))).at n=22A226119
• Length of period of Narayana sequence A000930 modulo n-th prime.at n=37A271901
• Numbers whose square contains all of the digits 1 through 9.at n=24A294661
• Number of integer partitions of n in which the even parts appear as often at even positions as at odd positions.at n=44A300787
• Squarefree integers m > 1 such that if prime p divides m, then s_p(m) >= p and s_p(m) == 3 (mod p-1), where s_p(m) is the sum of the base p digits of m.at n=7A324405
• Composite numbers k such that P(k, 7) == 7 (mod k), where P(k, 7) = A084768(k) is the k-th Legendre polynomial evaluated at 7.at n=19A330205
• Numbers which are the product of two S-primes (A057948) in exactly three ways.at n=23A343828