20583

Appears in sequences

• Fibonacci sequence beginning 3, 19.at n=16A022128
• Numbers n such that (n+j) mod (2+j) = 1 for j from 0 to 5 and (n+6) mod 8 <> 1.at n=24A096024
• Numbers k such that k and 3*k, taken together, are pandigital.at n=2A115923
• Numerators of second column of the inverse of the triangle of polynomial coefficients P(0,x)=1, 2P(n,x)=(1+x)*[(1+x)^(n-1)+x^(n-1)].at n=14A141424
• Euler transform of powers of 9.at n=4A144073
• Autosequence preceding A198631(n)/A006519(n+1). Numerators.at n=15A233808
• Autosequence preceding A198631(n)/A006519(n+1). Numerators.at n=16A233808
• Expansion of (1+x-x^3) / (1-4*x-x^4-x^5).at n=7A275907
• Square array A(n,k), n >= 1, k >= 0, read by antidiagonals: A(n,k) = Sum_{j=1..n} j^k * floor(n/j).at n=59A319649
• Expansion of e.g.f. (exp(x) - 1)/(exp(x) - exp(2*x) + 1).at n=6A320352
• Brent's irregular triangle T[r,k] related to Hardy-Littlewood constants of prime gaps 2r.at n=73A381083