31488

Appears in sequences

• Numbers k such that (k / product of digits of k) is 1 or a prime.at n=42A001103
• arcsin(tanh(x)+tan(x))=2*x+8/3!*x^3+320/5!*x^5+31488/7!*x^7...at n=3A013135
• When squared gives number composed of digits {1,4,9}.at n=9A027675
• Starting positions of strings of 3 1's in the decimal expansion of Pi.at n=33A050209
• Smallest number that is n times the product of its digits or 0 if impossible.at n=40A056770
• Coefficient of q^1 in nu(n), where nu(0)=1, nu(1)=b and, for n >= 2, nu(n) = b*nu(n-1) + lambda*(1 + q + q^2 + ... + q^(n-2))*nu(n-2) with (b,lambda)=(2,2).at n=10A074358
• Numbers k such that k and k^2 use only the digits 1, 3, 4, 8 and 9.at n=18A137031
• a(n) = ((3+sqrt(5))*(1+sqrt(5))^n + (3-sqrt(5))*(1-sqrt(5))^n)/2.at n=8A163062
• Numbers of the form p^8*q*r where p, q, and r are distinct primes.at n=19A179747
• Number of 3-step king's tours on an n X n board summed over all starting positions.at n=24A186862
• Index of the first occurrence of a string of exactly n consecutive odd digits in the decimal expansion of Pi.at n=18A239316
• Numbers that are the product of exactly 10 primes and are of the form prime(n) + prime(n + 1).at n=14A281927
• Number of ways to choose an integer partition of each factor in a factorization of n.at n=38A318948
• Number of ways to write n as an orderless product of orderless sums.at n=38A318949
• Total number of binary digits in the partitions of n into odd parts.at n=41A319142
• Numbers that are both Zuckerman numbers and Smith numbers.at n=4A351618
• Sum of the number of cells alive after 2 generations of Conway's game of life for initial 1 X n cells taken in all 2^n combinations of alive or dead.at n=12A384694