142624

Appears in sequences

• Number of labeled chain graphs.at n=4A026865
• 3-apexes of Omega: numbers k such that Omega(k-3) < Omega(k-2)< Omega(k-1) < Omega(k) > Omega(k+1) > Omega(k+2) > Omega(k+3), where Omega(m) = the number of prime factors of m, counting multiplicity.at n=34A076760
• a(n) is the number of distinct billiard words with length n on an alphabet of 4 symbols.at n=10A180239
• Number of 3Xn arrays containing n copies of 0..3-1 with no element 1 greater than its north, southwest or southeast neighbor modulo 3 and the upper left element equal to 0.at n=12A266922
• p-INVERT of (0,1,0,1,0,1, ...), where p(S) = (1 - 2 S - S^2)^2.at n=9A291254
• T(m,n) is the least k such that the partial sum of the series Sum_{j=0..k} 1/(m*j+1) is > n, read by ascending antidiagonals.at n=25A337748