111880

Appears in sequences

• Index of the first occurrence of A019565(2n-1) in sequence A103790.at n=41A103791
• Expansion of (Product_{k>0} (1 - x^(5*k)) / (1 - x^k))^5 in powers of x.at n=12A285928
• Number of vertices in a "frame" of size n X n (see Comments in A331776 for definition).at n=20A332598
• a(n) = the n-th order Taylor polynomial (centered at 0) of c(x)^(4*n) evaluated at x = 1, where c(x) = (1 - sqrt(1 - 4*x))/(2*x) is the o.g.f. of the sequence of Catalan numbers A000108.at n=5A333096
• Starts of runs of 3 consecutive tribonacci-Niven numbers (A352089).at n=40A352091