43056

Appears in sequences

• Coordination sequence for F_4 lattice.at n=9A019558
• a(n) = n-th quintic factorial number divided by 3.at n=4A034300
• Number of nonnegative solutions of x1^2 + x2^2 + ... + x24^2 = n.at n=5A045854
• Numbers k such that phi(prime(k) + 1) == 0 (mod k).at n=20A067732
• a(n) = (n+1)*a(n-5), with a(0)=a(1)=a(2)=a(3)=a(4)=1.at n=22A081408
• Numbers k such that 2^k - 1 is divisible by (k-1).at n=28A087965
• E.g.f. A(x) satisfies: x/(1-x)^2 = Sum_{n>=1} (1/n!)*Product_{j=0..n-1} A(2^j*x).at n=6A134529
• The smallest pronic (A002378) with the same most significant digits as n.at n=42A163599
• a(n) = 25*n^2 + 25*n + 6.at n=41A177059
• Number of (n+2) X (5+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=21A252716