52130

Appears in sequences

• Numbers k that divide 9^k + 7^k.at n=25A045605
• Numbers divisible by the sum of factorials of their digits [A061602(n)] and also terminate in the sum of factorials of their digits.at n=26A071064
• Number of lower triangles of a 5 X 5 0..n array with each element differing from all of its horizontal and vertical neighbors by one.at n=19A195001
• a(n) is the optimal wire-length for an n X n grid.at n=38A195647
• Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape L; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=40A247704
• a(n) = the fractional part of 1 / A003592(n) read backwards.at n=9A299025