48792

Appears in sequences

• a(n) = Sum_{d|n and gcd(d, n/d)=1} binomial(n,d).at n=17A056190
• Triangle T(n, k) = T(n-1, k) + T(n-1, k-1) + (j+1)*prime(j)*T(n-2, k-1) with j=4, read by rows.at n=30A153649
• Triangle T(n, k) = T(n-1, k) + T(n-1, k-1) + (j+1)*prime(j)*T(n-2, k-1) with j=4, read by rows.at n=33A153649
• a(n) = 1728*n - 1320.at n=28A157263
• Number of 7-step one space at a time bishop's tours on an n X n board summed over all starting positions.at n=11A187160
• Inverse Euler transform of [3, 13, 55, 233, 987, 4181, 17711, 75025, 317811, ...], Fibonacci(3*k+1).at n=8A290750
• a(n) is the number of semi-meanders with n top arches that have both an arch of length 1 adjacent to the center of the top arch configuration and an arch of length 1 starting or ending the top arch configuration.at n=12A337581