56430

Appears in sequences

• Smaller of unitary amicable pair.at n=5A002952
• Unitary amicable numbers.at n=10A063991
• Numbers whose number of divisors equals the sum of their separate prime-power decompositions.at n=20A087004
• Triangle read by rows: T(n,k) (n >= 2, k >= 0) is the number of non-crossing connected graphs on n nodes on a circle, having k triangles. Rows are indexed 2,3,4,...; columns are indexed 0,1,2,....at n=32A089435
• Numbers of length n binary words with fewer than 5 0-digits between any pair of consecutive 1-digits.at n=16A145113
• a(n) = 100*n^2 - 49*n + 6.at n=23A157651
• a(n) is the smallest member of the n-th purely periodic unitary sigma aliquot cycle listed in A336216.at n=13A336219
• Primitive terms of A023197 that are of the form 4u+2.at n=38A388020