59217
domain: N
Appears in sequences
- Numbers k such that 51*2^k+1 is prime.at n=40A032375
- Number of base 21 circular n-digit numbers with adjacent digits differing by 1 or less.at n=9A124714
- Volume of torus (rounded down) with major radius = n and minor radius = n/3.at n=29A228641
- 7-step Fibonacci sequence starting with (0,0,0,1,0,0,0).at n=23A251712
- Number of (n+1) X (1+1) 0..4 arrays with each row and column divisible by 9, read as a base-5 number with top and left being the most significant digits.at n=10A263375
- a(n) = (conjectured) smallest positive integer k which is neither of the form p + n^x nor of the form p - n^x with x >= 0 and p prime, where gcd(k, n) = 1 and gcd(k^2-1, n-1) = 1.at n=26A283619