115968

Appears in sequences

• a(n) = n!*Sum_{j=0..n-1} 2^j/(j+1).at n=7A126674
• Number of Proth primes < 10^n.at n=12A239234
• Number of (n+2) X (4+2) 0..3 arrays with every 3 X 3 subblock row and column sum equal to 0 2 3 6 or 7 and every 3 X 3 diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.at n=13A252110
• Number of permutations of [n] avoiding {3412, 3421, 1324}.at n=12A294802