164224

Appears in sequences

• Expansion of (1-2*x-3*x^2)/((1-2*x)*(1-4*x)).at n=9A087440
• Triangle T(n,k) giving the number of terms of A219666 which have n digits (A084558) in their factorial base expansion and whose most significant digit (A099563) in that base is k.at n=45A230420
• Triangle A230420 transposed.at n=54A230421
• Triangle, read by rows, each row n being defined by g.f. Product_{k=1..n} (k + x + 2*k*x^2), for n >= 0.at n=46A322891
• Numbers k such that k and k+1 are both in A376616.at n=33A376793