20286

Appears in sequences

• Numbers that have exactly six prime factors counted with multiplicity (A046306) whose digit reversal is different and also has 6 prime factors (with multiplicity).at n=24A109026
• Triangle read by rows: T(n,k) is number of hex trees with n edges and level of first leaf (in the preorder traversal) equal to k (1 <= k <= n).at n=38A126186
• Twice partition numbers.at n=33A139582
• Numbers n such that n^6 + 545 is prime.at n=9A163592
• Record (maximal) gaps between prime triples (p, p+2, p+6).at n=33A201598
• Number of (w,x,y,z) with all terms in {1,...,n} and 3w = x + y + z + n + 1.at n=42A212251
• Product of n and the sum of remainders of n mod k, for k = 1, 2, 3, ..., n.at n=48A256532
• Irregular triangle read by rows: T(n,k) is the number of n X n tic-tac-toe positions (up to rotation and reflection) with k tokens (i.e., after k plays) which end a game (n > 0, 0 <= k <= n^2).at n=28A317576
• Number of separable partitions of n in which the number of distinct (repeatable) parts is 4.at n=50A325648
• (A331763(n) - A331755(n+1))/2.at n=30A335687
• Triangular array read by rows. T(n,k) is the number of Green's H-classes of rank k in the semigroup of partial transformations, n >= 0, 0 <= k <= n.at n=30A363849
• Consecutive states of the linear congruential pseudo-random number generator 171*s mod 30269 when started at s=1.at n=9A385031