14913991

Appears in sequences

• Gaussian binomial coefficient [ n,2 ] for q = -2.at n=12A015249
• Gaussian binomial coefficient [ n,12 ] for q=-2.at n=2A015423
• Exponential self-convolution of Jacobsthal numbers (divided by 2).at n=14A084152
• Jacobsthal oblong numbers.at n=13A084175
• Jac(n)(2Jac(n)-1).at n=13A095129
• Carmichael numbers C such that C-1 is not a Niven/Harshad number.at n=28A097061
• Carmichael numbers that are not == 1 mod 12. There are 69 Carmichael numbers out to 2*m+1, m=2*10^6 and all but the above 9 are 1 mod 12.at n=13A110889
• A084175 interleaved with 2*A084175.at n=26A138477
• First differences of A138477.at n=26A138495
• Carmichael numbers congruent to 3 modulo 4.at n=5A185321
• Carmichael numbers that are not of the form x^2 + y^2 + z^2 where x, y and z are integers.at n=3A267462
• Triangular Carmichael numbers.at n=9A290945
• Carmichael numbers all of whose prime factors are congruent to 3 modulo 4.at n=8A329468
• Odd composite numbers k such that A111076(k)^((k-1)/2) == -1 (mod k).at n=3A329538
• Odd squarefree composite numbers k such that p-1 divides k-1 and p-1 does not divide (k-1)/2 for every prime p|k.at n=8A329799
• Carmichael numbers with exactly 3 prime factors, p*q*r, such that p-1, q-1 and r-1 have an equal 2-adic valuation.at n=8A382791