65730

Appears in sequences

• a(n) = floor(C(2n,n)/2^(n+1)).at n=20A024504
• Numbers with exactly 5 distinct prime factors each of which is a palindrome.at n=13A046403
• a(n) = A050314(2n+1,1): column 1 of triangle.at n=29A050316
• A089450 indexed by A000040.at n=25A089525
• Numbers k having exactly 5 distinct prime factors, the largest of which is greater than or equal to sqrt(k) (i.e., sqrt(k)-rough numbers with exactly 5 distinct prime factors).at n=18A115959
• Numbers k such that k^6 + 82991 is prime.at n=12A126893
• Number of two-sided n-step prudent walks ending on the top side or the right side of their boxes, avoiding two consecutive west steps and south steps.at n=12A190795
• Triangular array read by rows. T(n,k) is the number of rooted labeled trees on n nodes with exactly k vertices whose unique descendent is a leaf, n >= 1, 0 <= k <= floor((n-1)/2) + delta_{2,n}.at n=14A284417
• Numbers n for which 2 < A257993(A276086(A276086(n))) < A257993(n), where A276086 converts the primorial base expansion of n into its prime product form, and A257993 returns the index of the least prime not present in its argument.at n=43A328762
• Numbers k sandwiched between twin primes, such that k times the reverse of k is also sandwiched between twin primes.at n=40A357076