49726

Appears in sequences

• Generalized Stirling numbers, [n+2,n]_2.at n=23A001701
• Even pentagonal pyramidal numbers.at n=34A015224
• a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = 2*n - 3 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1 and a(2) = a(3) = 3.at n=15A049972
• a(n) = 4n^3 + 2n^2.at n=22A089207
• a(0)=4, a(n)=a(n-1)^2 - n for n > 0.at n=3A153060
• a(n) = 94*n^2.at n=23A174337
• Expansion of -(4*x^3-7*x^2+4*x-1)/(2*x^4-5*x^3+8*x^2-5*x+1).at n=12A271176
• Number of n-chains of divisors of n.at n=44A343939
• Primitive terms of A108569.at n=30A346277
• Smallest integer m = b*c which satisfies (b + c)*n = m - 1.at n=44A364169
• a(n) = (3*n - 2)^2*(3*n - 1)/2.at n=15A386906
• Numbers k such that sigma(k) = psi(k) + tau(k)^2.at n=41A390296