31416

Appears in sequences

• Number of esters with n carbon atoms up to stereo-isomerism.at n=11A005958
• Decimal expansion of Pi rounded to n places.at n=4A011546
• Numbers k such that 151*2^k+1 is prime.at n=12A032425
• a(n) = n-th quintic factorial number divided by 2.at n=4A034323
• Number of nonempty subsets of {1,2,...,n} in which exactly 2/3 of the elements are <= n/3.at n=24A047195
• Number of nonempty subsets of {1,2,...,n} in which exactly 2/3 of the elements are <= (n-1)/3.at n=24A048007
• Number of nonempty subsets of {1,2,...,n} in which exactly 2/3 of the elements are <= (n+1)/3.at n=24A048040
• Numbers k such that sopfr(k) = sopfr(k + sopfr(k)).at n=30A050780
• (Terms in A029613)/2.at n=36A051435
• (Terms in A029627)/2.at n=54A051457
• Partial sums of A007587.at n=15A051799
• a(n) = lcm(n, n+1, n+2, n+3, n+4) / 60.at n=31A067048
• a(n) = (n+1)*a(n-5), with a(0)=a(1)=a(2)=a(3)=a(4)=1.at n=21A081408
• a(n) = binomial(n+2,2) * binomial(n+7,2).at n=15A104676
• a(n) = denominator of the sum of reciprocals of the terms in n-th row of triangle A126571.at n=5A126576
• Let spm(n) be the sum of all prime factors of n counted with multiplicities (A001414); sequence gives numbers n such that spm(n+spm(n)) divides both n and n+spm(n).at n=17A131564
• Numbers m such that product of factorials of digits of m equals sigma(m).at n=10A137603
• Number of permutations of floor(i*8/7), i=0..n-1, with all sums of 5 adjacent terms unique.at n=7A152364
• Triangle T(n, k) = Product_{j=0..k} (j*n + prime(m)), with T(n, 0) = prime(m) and m = 4, read by rows.at n=18A153272
• a(n) = 4*(3*n+2)*(2*n+1)*(n+2)*(n+1).at n=6A155122