72720

Appears in sequences

• First diagonal of A027516.at n=15A027519
• E.g.f. (1-x^2)/(1-2x-x^2+x^3).at n=6A052662
• n times n+9 gives the concatenation of two numbers m and m-8.at n=6A116240
• a(n) = a(n-1) + (sum of the terms, from among the first (n-1) terms of the sequence, which are coprime to the n-th Fibonacci number).at n=14A131788
• Convolution of primorial numbers (A002110) with themselves.at n=6A333370
• Integers m such that the decimal expansion of 1/m contains only odd digits other than leading or trailing zeros.at n=46A353614