34587

Appears in sequences

• (+2)-sigma perfect numbers: numbers k such that (+2)sigma(k) = 2*k, where (+2)sigma(k) = A107758(k).at n=16A052396
• Starting positions of strings of three 4's in the decimal expansion of Pi.at n=23A083615
• Number of base 19 n-digit numbers with adjacent digits differing by three or less.at n=5A126487
• Number of ways to split an integer partition of n into consecutive subsequences of equal length.at n=33A323433
• a(n) = Sum_{i=1..n, j=1..n, gcd(i,j)=2} (n+1-i)*(n+1-j).at n=29A331761
• Number of ways to write n as an ordered sum of 7 primes (counting 1 as a prime).at n=27A341986
• Least multiple m of n such that both m and m/n belong to A031443, or -1 if there is no such m.at n=8A358858