25430

Appears in sequences

• Numbers k such that 2*7^k + 3 is prime.at n=19A059075
• Numbers that contain as proper substrings every maximal prime power dividing them.at n=19A059401
• 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, 0), (-1, -1, 1), (-1, 0, 1), (0, 1, -1), (1, 0, 0)}.at n=11A148085
• Number of subsets of {1, 2, ..., n} containing n and having <=5 pairwise coprime elements.at n=46A186989
• Number of n X 3 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 4 binary array having a sum of one, with rows and columns of the latter in lexicographically nondecreasing order.at n=8A227382
• Number of length 4 1..(n+2) arrays with no leading or trailing partial sum equal to a prime.at n=19A254207
• Number T(n,k) of set partitions of [n] such that the maximal absolute difference between consecutive elements within a block equals k; triangle T(n,k), n>=0, 0<=k<=max(n-1,0), read by rows.at n=51A287213
• Number of set partitions of [2n] such that the maximal absolute difference between consecutive elements within a block equals n.at n=5A294024
• Number of set partitions of [n] such that the maximal absolute difference between consecutive elements within a block equals five.at n=4A294054
• Number of integer partitions of n of which every permutation has a consecutive monotone triple, i.e., a triple (..., x, y, z, ...) such that either x <= y <= z or x >= y >= z.at n=45A344654
• Number of integer partitions of n without an alternating permutation.at n=45A345165
• Number of integer partitions of n whose product is a multiple of n + 1.at n=51A379320