31415

Appears in sequences

• a(n) is the integer whose decimal digits are the first n+1 decimal digits of Pi.at n=4A011545
• Triangular array, read by rows: T(n,k) = greatest decimal number of length k contained as a string in the first n positions of the decimal expansion of Pi, 1 <= k <= n.at n=14A086667
• Triangular array, read by rows: T(n,k) = greatest decimal number of length k contained as a string in the first n positions of the decimal expansion of Pi, 1 <= k <= n.at n=19A086667
• Squarefree kernel of floor(Pi*10^n), Pi = 3.14....at n=4A089289
• Put the natural numbers together without spaces and read them five at a time advancing one space each time.at n=16A193493
• Numbers n such that (4 * 6^n + 1)/5 is prime.at n=24A248613
• a(n) is the smallest composite squarefree number k such that (p+n) | (k+1) for all primes dividing k.at n=15A274446
• First 5-digit number to appear n times in the decimal expansion of Pi.at n=0A277171
• Scan first k digits of Pi starting with 3, for k = 1,2,3,..., record all distinct numbers in the order in which they appear.at n=9A322777