891891

Appears in sequences

• Odd abundant numbers not divisible by 5.at n=22A064001
• A symmetrical triangle of coefficients based on A001147: a(n)=(2*n-1)*a(n-1); t(n,m)=a(n)^2/((2*n - 1)*a(m)*a(n - m)).at n=31A143081
• A symmetrical triangle of coefficients based on A001147: a(n)=(2*n-1)*a(n-1); t(n,m)=a(n)^2/((2*n - 1)*a(m)*a(n - m)).at n=32A143081
• Expansion of 1/((1-3x)(1-9x)(1-27x)).at n=4A227524
• Terms of A338039 that are repeated concatenations of smaller integers.at n=13A338166
• a(n) = ord(2,A006935(n)/2), where ord(k,m) is the multiplicative order of k modulo m.at n=30A350084
• Odd abundant numbers not divisible by 5 that are also doublets (cf. A020338).at n=16A380233