18259

Appears in sequences

• Weight distribution of [ 31,16,7 ] binary BCH and quadratic-residue codes.at n=15A028382
• Weight distribution of [ 31,16,7 ] binary BCH and quadratic-residue codes.at n=16A028382
• Weight distribution of [ 31,15,8 ] binary quadratic-residue code.at n=4A028383
• Distinct odd numbers in the numerators of the 1/3-Pascal triangle (by row).at n=47A046557
• Distinct odd numbers in writing first numerator and then denominator of each element to the right of the central elements of the 1/3-Pascal triangle (by row).at n=46A046561
• a(n) = n*(8*n^2 - 5)/3.at n=19A063523
• Number of log-concave compositions (ordered partitions) of n.at n=47A069916
• Number of n-ominoes plus number of n-iamonds.at n=11A119532
• Numbers whose square starts with 4 identical digits.at n=19A132391
• Ulam's spiral (ESE spoke).at n=34A143855
• Numbers n such that 4n+1 is a palindromic prime.at n=35A192261
• Number of partitions p of n such that (number of numbers in p of form 3k) > (number of numbers in p of form 3k+1).at n=45A241745
• a(n) = 19*n^2.at n=31A244631
• Maximal non-semiprime number which is a "preprime" of the n-th kind (defined in comment in A247395).at n=24A247834
• a(n) = 3*a(n-1) - 3*a(n-2) + 2*a(n-3) - 2*a(n-4) + a(n-5) for n >= 10, a(0) = 2, a(1) = 4, a(2) = 7, a(3) = 12, a(4) = 20, a(5) = 32, a(6) = 50, a(7) = 77, a(8) = 116, a(9) = 174.at n=21A289115
• Partial sums of A033617.at n=33A299903
• Numbers whose square starts with exactly 4 identical digits.at n=18A346940
• Numbers p^2*q, p > q odd primes such that q does not divide p-1, and q does not divide p+1.at n=33A350421
• The five digits of a(n) and their four successive absolute first differences are all distinct.at n=3A365257