39853

Appears in sequences

• Star numbers (A003154) whose digital sum and product of nonzero digits are both triangular numbers.at n=5A083748
• Number of (n+3) X 6 binary arrays with every 4 X 4 subblock commuting with each horizontal and vertical neighbor 4 X 4 subblock.at n=17A188099
• Centered 12-gonal numbers which are semiprimes, intersection of A003154 and A001358.at n=36A218172
• Fundamental discriminants d uniquely characterizing all complex biquadratic fields Q(sqrt(-3),sqrt(d)) which have 3-class group of type (3,3) and second 3-class group isomorphic to either SmallGroup(2187,247)-#1;5 or SmallGroup(2187,247)-#1;9.at n=12A250242
• Numbers k such that 6*k + 1 is a prime that can be written as p*q + 2, with p and q being consecutive primes.at n=18A342564