49404

Appears in sequences

• Numbers whose base-4 representation contains exactly four 0's and four 3's.at n=3A045085
• McKay-Thompson series of class 32A for Monster.at n=46A058629
• (-1)^n * coefficient of x^n in 1/x-1/(1-eta(x)) power series.at n=29A082531
• Numbers k such that sopfr(k + omega(k)) = sopfr(k), where sopfr(i) = A001414(i) and omega(i) = A001221(i).at n=33A187878
• The sum over all bitstrings b of length n with at least two runs of the number of runs in b not immediately followed by a longer run.at n=12A208903
• Numbers k such that (7*10^k + 53)/3 is prime.at n=20A293683
• G.f. A(x) = Sum_{n=-oo..+oo} x^(n^2) * (2 - x^n)^n/(1 - 2*x^n)^n.at n=15A380680