61226

Appears in sequences

• Number of (s(0),s(1),...,s(n)) such that every s(i) is a nonnegative integer, s(0) = 1, |s(1) - s(0)| = 1, |s(i) - s(i-1)| <= 1 for i >= 2. Also sum of numbers in row n+1 of the array T defined in A026120.at n=11A026135
• Numbers k such that the sum of the Carmichael lambda functions of the divisors is a proper divisor of k.at n=31A131492
• Binomial convolution of the Floor-Sqrt transform of central binomial coefficients.at n=9A192658
• Number of (w,x,y,z) with all terms in {1,...,n} and w <= x > y <= z.at n=23A212246
• Expansion of x*(1 + 3*x + x^2)/((1 - x)^5*(1 + x)^4).at n=44A287143
• Primitive terms of A108569.at n=32A346277
• a(n) = (3*n^5 + 5*n^3)/8.at n=10A372583
• a(n) = (1/3)*n^5 + (1/2)*n^4 + (1/6)*n^3.at n=11A373561