144584

Appears in sequences

• Number of simple labeled graphs on n+2 nodes with exactly n connected components that are trees or cycles.at n=31A215862
• Numbers k such that both k and k+1 are bi-unitary abundant numbers.at n=8A318167
• a(n) is the index of the smallest n-gonal pyramidal number divisible by exactly n n-gonal pyramidal numbers.at n=13A358059
• Numbers k such that k and k+1 both have an odd number of abundant divisors.at n=10A381548
• Numbers k such that each of k and k+1 is either a practical number (A005153) or an almost practical number (A174533).at n=26A387654