75008

Appears in sequences

• a(n) = (3*10^n + 2^n)/4.at n=5A083234
• Smallest i such that prime(n) divides gcd(sigma(i), phi(i)) (cf. A009223).at n=20A222714
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 299", based on the 5-celled von Neumann neighborhood.at n=16A280836
• Decimal representation of the diagonal from the origin to the corner of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 489", based on the 5-celled von Neumann neighborhood.at n=16A288649
• a(n) = A341886(n)/2; numbers k such that A307437(k) is even.at n=14A341887
• Irregular triangle read by rows: T(n,k) is the number of chordless cycles of length k in the n-diagonal intersection graph, 4 <= k <= kmax.at n=63A371340
• Primitive terms of A388271.at n=38A388272