21939

Appears in sequences

• Triangle read by rows: T(n,k) = (1/4)*(A007318(n,k) - 6*A008292(n+1,k+1) + 9*A060187(n+1,k+1)).at n=23A142175
• Triangle read by rows: T(n,k) = (1/4)*(A007318(n,k) - 6*A008292(n+1,k+1) + 9*A060187(n+1,k+1)).at n=25A142175
• Triangle T(n,k), read by rows n>=0 with terms k=1..3^n, where row n lists the coefficients in the n-th iteration of x*(1+x)^2.at n=33A166888
• Partial sums of A147562.at n=39A272928
• Numbers k such that (5*10^k + 97)/3 is prime.at n=16A294921