106784

Appears in sequences

• Number of perfect matchings in graph C_{3} X C_{5} X P_{2n}.at n=1A028466
• Numbers k such that both k and k+1 are abundant.at n=29A096399
• Numbers k such that both sigma(k) >= 2*k-1 and sigma(k+1) >= 2*(k+1)-1.at n=31A103289
• Numbers k such that both k and k+1 are bi-unitary abundant numbers.at n=6A318167
• Numbers k such that both k and k+1 are Zumkeller numbers (A083207).at n=27A328327
• Numbers k such that each of k and k+1 is either a practical number (A005153) or an almost practical number (A174533).at n=19A387654