44787

Appears in sequences

• a(1) = 3; a(n) = smallest number such that the forward as well as the reverse n-th partial concatenation is a prime for n>1. (Reverse concatenation is taken term-wise and not digit-wise).at n=34A083993
• Number of base 7 n-digit numbers with adjacent digits differing by two or less.at n=7A126394
• Number of nX3 0..1 arrays with every element unequal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=13A317858
• Expansion of Product_{k>=2} 1/(1 - x^k)^p(k), where p(k) = number of partitions of k (A000041).at n=18A317911