26596

Appears in sequences

• Numbers k that divide 4^k + 4.at n=17A015889
• Integers n > 10553 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 10553.at n=28A063061
• phi(n) + phi(reverse(n)) = sigma(n).at n=7A071846
• Even pseudoprimes to base 9.at n=30A090083
• Number of (n+3) X 4 binary arrays with every 4 X 4 subblock commuting with each horizontal and vertical neighbor 4 X 4 subblock.at n=9A188097
• Pseudoprimes to base 9 that are not squarefree.at n=28A306448
• Even composite integers m such that U(m)^2 == 1 (mod m) and V(m) == 7 (mod m), where U(m)=A004187(m) and V(m)=A056854(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=7 and b=1, respectively.at n=40A337782