87000

Appears in sequences

• Number of single component edge-subgraphs in Moebius ladder M_n.at n=4A020868
• Composite numbers k such that k - phi(k) divides sigma(k) - k.at n=17A068418
• Composite n such that n reduced mod(phi(n)) = sigma(n) reduced mod(n).at n=16A068495
• Integer quotient defining A068418 is 3.at n=7A069737
• Sequence of coefficients of x^1 in marked mesh pattern generating function Q_{n,132}^(0,4,0,0)(x).at n=23A212347
• Number of standard Young tableaux with 2n cells and n as last value in the first row.at n=7A245000
• Number of standard Young tableaux with n cells and 7 as last value in the first row.at n=7A245005
• Expansion of Product_{k>=1} (1 - 4*x^k)/(1 + 4*x^k).at n=8A303402
• Least k such that p = k^2 + 1 and q = (k+2n)^2 + 1 are two consecutive prime numbers of the same form with q - p square.at n=24A339008