141201

Appears in sequences

• Numbers k such that 187*2^k-1 is prime.at n=16A050845
• Numbers n such that n-1, n and n+1 can be expressed as a sum of 2 squares in at least 2 ways.at n=30A091459
• Number of (n+1) X (4+1) 0..2 arrays with every 2 X 2 subblock summing to 4 and no 2 X 2 subblock having exactly two nonzero entries.at n=13A251145
• E.g.f. A(x) satisfies: [x^n] A(x)^(6*n) = (n+5) * [x^(n-1)] A(x)^(6*n) for n>=1.at n=5A300992