91368

Appears in sequences

• Number of terms (excluding the first) of A002211 for which the geometric mean produces progressively better approximations to Khinchin's constant (itself).at n=26A048613
• Sequence of the "Natural Jewels": a natural jewel is a number that is totally enclosed by prime numbers in a version of Ulam Spiral.at n=32A172294
• Number of representations of n as a sum of products of pairs of positive integers, n = Sum_{k=1..m} i_k*j_k with i_k<=j_k, i_k<=i_{k+1}, j_k<=j_{k+1}, i_k*j_k<=i_{k+1}*j_{k+1}.at n=43A212214
• Least positive integer k such that k and k*n are terms of A259539.at n=14A259540
• Partial sums of A299254.at n=38A299260
• Numbers on the square spiral board that are enclosed by four primes.at n=31A341542
• Expansion of 1/(2 - (1 + 9*x)^(2/3)).at n=7A373714
• Expansion of (1 - 9*x*(1 - 9*x)^(1/3))^(1/3).at n=7A377244