25465

Appears in sequences

• Pseudoprimes to base 21.at n=41A020149
• Numbers k such that k and k^2 use only the digits 2, 4, 5, 6 and 8.at n=19A137095
• a(n) = 5*a(n-1) - 5*a(n-2) - 3*a(n-3).at n=10A137212
• 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, 0, 1), (-1, 1, 0), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.at n=8A149769
• The hyper-Wiener index of the zig-zag polyhex nanotube TUHC_6[2n,2] defined pictorially in Fig. 1 of the Eliasi et al. reference.at n=9A227704
• Number of times a number of the form 4n+2 is encountered when iterating from 2^(n+1)-2 to (2^n)-2 with the map x -> x - (number of runs in binary representation of x).at n=19A255126
• Number of 2 X 2 matrices with all elements in {-n,..,0,..,n} with determinant = 2*permanent.at n=27A280343
• Lexicographically earliest sequence of distinct terms > 0 such that the sum a(n) + a(n+1) is a substring of the concatenation (a(n), a(n+1)).at n=35A359482