196724

Appears in sequences

• Smaller of an amicable pair: (a,b) such that sigma(a) = sigma(b) = a+b, a < b.at n=21A002025
• Conjectured list of smallest terms of k-sociable cycles of order r.at n=31A183016
• Smaller members of regular amicable pairs.at n=15A215491
• Abundant numbers whose aliquot sequence is abundant, deficient, abundant, ..., etc.at n=30A234969
• Number of (n+2) X (2+2) 0..1 arrays with every 3 X 3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=4A255030
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=19A255036
• Number of (5+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=1A255040
• Amicable pairs.at n=42A259180
• Amicable pairs (x < y) ordered by nondecreasing sum (x + y) and then by increasing x.at n=42A259933
• Smaller of amicable pair (x, y) as they are listed in A259933.at n=21A260086
• Euler transform of Pell numbers.at n=13A261329
• Amicable pairs of even numbers.at n=32A262622
• Even amicable numbers.at n=31A262624
• Twin amicable numbers (m,n) where there is not any part of another amicable pair between m and n.at n=20A273259
• (1+e)-sigma amicable numbers.at n=35A274116
• Amicable pairs with the property that both members have the same number of divisors.at n=18A328064
• Lesser of recursive amicable numbers pair: numbers m < k such that m = s(k) and k = s(m), where s(k) = A333926(k) - k is the sum of proper recursive divisors of k.at n=18A333929