28107

Appears in sequences

• Number of partitions in parts not of the form 21k, 21k+1 or 21k-1. Also number of partitions with no part of size 1 and differences between parts at distance 9 are greater than 1.at n=49A035979
• Concatenate n with n-th prime.at n=27A045532
• a(n) = A007318 * [1, 6, 14, 9, 0, 0, 0, ...].at n=26A143690
• Numbers a = b + c where a, b, and c contain the same decimal digits.at n=35A203024
• Number of (n+1) X (1+1) 0..2 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=4A253742
• Number of (n+1)X(5+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=0A253746
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=10A253749
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=14A253749
• Number of (5+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=0A253753
• Distinct-digit numbers that are the concatenation of m and prime(m) for some number m.at n=18A255729
• Number of permutations of [n] avoiding {4231, 3412, 1234}.at n=13A294725
• a(n) = Sum_{1 <= i, j <= n} gcd(i, j, n)^3.at n=26A368743