198476

Appears in sequences

• a(n) is the number of invertible 2 X 2 upper triangular matrices over Z_p where p = prime(n).at n=16A270775
• Indices of (probable) primes in A030221.at n=24A299101
• Integers m such that there exist one prime p and one positive integer k, for which the expression k^3 + k^2*p is a perfect cube m^3.at n=28A338610
• Numbers which form a prime by appending a 3-digit number and form no primes by appending 1 digit or 2 digits.at n=38A365813