297297

Appears in sequences

• a(n) = n^2*(n^2+3)/4.at n=32A039623
• Odd abundant numbers not divisible by 5.at n=9A064001
• a(n) = (n in base 10) * (n in base 2).at n=27A127906
• T(n,k) = denominator of 2*Pi*Sum_{j=0..n-k-1} ((-1)^j*n*(k + j + 2)*(n + k +j)!*(k + j)!^2)/((n - k - j - 1)!*(2*k + j + 1)!*j!*Gamma(k + j + 3/2)*Gamma(k + j + 5/2)), triangle read by rows (n >= 1, 0 <= k <= n - 1).at n=20A159983
• Triangle T(n,k) read by rows: coefficient [x^k] of the polynomial Product_{i=1..n} (x + q^i) in row n and q = 3.at n=25A173007
• Least odd primitive abundant number having its prime signature.at n=20A316116
• Primitive nondeficient numbers sorted by largest prime factor then by increasing size. Irregular triangle T(n, k), n >= 2, k >= 1, read by rows, row n listing those with largest prime factor = prime(n).at n=28A338133
• Primitive abundant numbers for which there is no smaller primitive abundant number having the same ordered prime signature.at n=34A357921
• Odd numbers k such that k divides A163511(k).at n=26A364495
• Odd abundant numbers that are also doublets (cf. A020338).at n=14A380232
• Odd abundant numbers not divisible by 5 that are also doublets (cf. A020338).at n=7A380233