40806

Appears in sequences

• a(n) = 1458*n - 18.at n=27A157508
• Words of length n over the alphabet {0,...,n-1} that avoid the pattern 1122.at n=6A239370
• Expansion of 1 / (1 + Sum_{k>=1} phi(k) * log(1 - 2 * x^k) / k), where phi = A000010.at n=9A329274
• Number of regions in a graph of n adjacent rectangles in a row with all possible diagonals drawn, as in A306302, but without the rectangles' edges which are perpendicular to the row.at n=21A369175
• Numbers k such that A003415(k) == A276085(k) (mod 5^5), where A003415 is the arithmetic derivative and A276085 is the primorial base log-function.at n=21A391865