17935

Appears in sequences

• Spiral sieve using Fibonacci numbers.at n=20A005626
• Odd heptagonal numbers (A000566).at n=42A014637
• a(n) = n*(31*n + 1)/2.at n=34A022289
• a(n) = (2*n + 1)*(5*n + 1).at n=42A033571
• Number of 3-rowed binary matrices with n ones and no zero columns, up to row and column permutation.at n=29A058053
• Number of finite positive integer sequences b(1),...,b(k), with k <= n and b(1)*b(2)*...*b(k) <= n.at n=14A064453
• Heptagonal numbers for which the digital root is also a heptagonal number.at n=39A117663
• Heptagonal numbers with only odd digits.at n=8A117993
• 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, 0, 1), (0, -1, 1), (0, 0, -1), (1, 1, 1)}.at n=8A149669
• a(n) = prime(n) * prime(n+2) - 2 * prime(n+1).at n=31A152532
• A positive integer n is included if n, when written in binary, is made of run-lengths (lengths of runs of 0's as well as of runs of 1's) that form a permutation of some number of consecutive positive integers starting with 1.at n=45A175061
• Companion value m associated with A177967(n).at n=28A177968
• The number of permutations avoiding the "boxed" pattern 123.at n=9A201168
• T(n,k)=Equals one maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 nXk array.at n=30A220537
• Equals one maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 3Xn array.at n=5A220539
• a(n) = Sum_{i=0..n} digsum_5(i)^4, where digsum_5(i) = A053824(i).at n=30A231671
• k such that either 2^k + k - 3 or 2^k + k - 2 is prime.at n=20A237816
• Numbers n such that n, p=prime(n) and q=prime(p) have the same sum of digits.at n=30A261142
• Number of (1+1) X (n+1) arrays of permutations of 0..n*2+1 filled by rows with each element moved a city block distance of 1 or 2, and rows and columns in increasing lexicographic order.at n=11A263587
• Sum of the sixth largest parts in the partitions of n into 7 parts.at n=48A308928