2102272

Appears in sequences

• Numbers k whose deficiency is 6.at n=6A141548
• Deficient numbers with increasing abundancy without being powers of 2.at n=16A228450
• Numbers a(n) = 2^(n-1) * f(n), where n >= 1 and f(n) is the smallest prime number larger than 2^n (A014210).at n=10A246956
• a(n) = 2^(n-1)*(2^n+5).at n=11A256873
• Numbers k such that sigma(k) == 0 (mod k-3).at n=11A274552
• Numbers whose deficiency is a perfect number.at n=40A302125
• Numbers n for which A294898(n) is not zero and A294898(n) divides A000120(n); numbers for which A326130(n) = abs(A294898(n)).at n=36A326132
• Array read by antidiagonals for k,n>=0: T(n,k) = number of tilings of a 2k X n rectangle using dominos and 2 X 2 right triangles.at n=51A362297