33839

Appears in sequences

• T(2n,n), T given by A026703.at n=7A026704
• T(n,[ n/2 ]), T given by A026703.at n=14A026709
• a(n) = n(n+7)(n+1)(n^2+2n+12)/120.at n=18A051746
• Numbers n such that sigma(n+1) = 2*sigma(n-1).at n=6A067134
• Number of perfect powers (A001597) not exceeding 2^n.at n=30A070228
• Expansion of psi(x^4) / f(-x) in powers of x where psi(), f() are Ramanujan theta functions.at n=37A226635
• a(n) = n*((4*n + 1)*(7*n - 4) + 15*n*(-1)^n)/48.at n=38A302766