176272

Appears in sequences

• Smaller of an amicable pair: (a,b) such that sigma(a) = sigma(b) = a+b, a < b.at n=19A002025
• Diagonal sums of A107111, viewed as a number triangle.at n=15A107113
• Riordan's general Eulerian recursion: T(n,k) = (k+2)*T(n-1, k) + (n-k) * T(n-1, k-1), with T(n,0) = 1, T(n,n) = 0.at n=50A157012
• Irregular triangle in which row n consists of the smaller of pairs of amicable numbers of the form 2^n pq, with p and q odd primes.at n=5A180650
• Conjectured list of smallest terms of k-sociable cycles of order r.at n=29A183016
• Number of -3..3 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having four or six distinct values for every i,j,k<=n.at n=8A211728
• Smaller members of regular amicable pairs.at n=13A215491
• Abundant numbers whose aliquot sequence is abundant, deficient, abundant, ..., etc.at n=26A234969
• Amicable pairs.at n=38A259180
• Amicable pairs (x < y) ordered by nondecreasing sum (x + y) and then by increasing x.at n=38A259933
• Smaller of amicable pair (x, y) as they are listed in A259933.at n=19A260086
• Amicable pairs of even numbers.at n=28A262622
• Even amicable numbers.at n=27A262624
• List of pairs of amicable numbers (m,n) where the sum of the pair is divisible by 10.at n=22A291422
• Amicable pairs with the property that both members have the same number of divisors.at n=16A328064