26242

Appears in sequences

• Least x>=3 such that F(x)==1 (mod 3^n) where F(x) denotes the x-th Fibonacci number (A000045).at n=9A079004
• Number of palindromes (in base 3) below 3^n.at n=17A117862
• Numbers k such that the k-th triangular number contains only digits {0,3,4}.at n=5A119060
• Numbers k such that k and k^2 use only the digits 2, 4, 5, 6 and 8.at n=22A137095
• Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 5 ones in any 5 X 5 X 5 subtriangle.at n=8A153945
• Number of (v,w,x,y,z) with all terms in {0,1,...,n} and v=average(w,x,y,z).at n=17A212257
• Number of binary arrays indicating the locations of trailing edge maxima of a random length-n 0..5 array extended with zeros and convolved with 1,4,6,4,1.at n=21A221996
• Composite numbers whose concatenation of their aliquot parts, in ascending order, is a palindrome.at n=35A249300
• Positive integers m such that none of the four consecutive numbers m, m+1, m+2, m+3 can be written as p^2 + q with p and q both prime.at n=16A258661
• Number of 2 X 2 matrices with all elements in 0..n such that the sum of the elements is prime.at n=17A281550
• a(n) = [x^n] (1/(1 - x))*Product_{k>=1} (1 + x^k)^n.at n=8A303071
• Sum of the ninth largest parts of the partitions of n into 10 parts.at n=50A326590
• Number of integer partitions of n into an odd number of parts, the greatest of which is odd.at n=45A340385
• Records in the trajectory of all positive integers in the 3x+1 or Collatz problem, including the trajectory [1, 4, 2, 1] of 1.at n=25A347652
• Numbers of the form 4u+2 in A351551.at n=6A351550