19807

Appears in sequences

• Odd numbers k such that the palindromic wing number (a.k.a. near-repdigit palindrome) 7*(10^k - 1)/9 - 2*10^((k-1)/2) is prime.at n=10A077785
• Numbers in ascending order formed by using all the digits of the next n numbers.at n=31A081991
• Number of distinct lines through the origin in 3-dimensional cube of side length n.at n=28A090025
• Number of base 27 circular n-digit numbers with adjacent digits differing by 5 or less.at n=4A125390
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 0, 1), (0, 1, -1), (1, 0, 0)}.at n=11A148080
• Number of length n+4 0..7 arrays with no five consecutive elements with pattern ababa or abbba (with a!=b) and new values 0..7 introduced in 0..7 order.at n=4A244699
• Total number of inversions in all partitions of n into distinct parts.at n=44A271371