28464

Appears in sequences

• A nonlinear binomial sum.at n=18A000128
• Sum of the first n safe primes.at n=37A066869
• Euler transform of A025225.at n=7A141318
• Number of -4..4 arrays x(i) of n+1 elements i=1..n+1 with x(i)+x(j), x(i+1)+x(j+1), -(x(i)+x(j+1)), and -(x(i+1)+x(j)) having three or four distinct values for every i<=n and j<=n.at n=3A211691
• Position of 7^n among 7-smooth numbers (A002473).at n=17A232093
• Number of compositions of n, where the difference between the number of odd parts and the number of even parts is 2.at n=17A242500
• Numbers k such that A = k+DigitProd(k) is divisible by the largest power of 10 <= A.at n=25A242948
• Least positive integer k such that both k and k*n belong to the set {m>0: prime(m) = prime(p)+2 for some prime p}.at n=22A261295
• Number of nX6 0..1 arrays with each 1 adjacent to 3 or 6 king-move neighboring 1s.at n=9A296311