168496

Appears in sequences

• a(1) = 1; for n>1, a(n) = smallest number that is not a sum or product of any subset of the numbers a(1) to a(n-1).at n=21A065026
• Number of essentially different ways in which the squares 1,4,9,...,n^2 can be arranged in a sequence such that all pairs of adjacent squares sum to a prime number. Rotations and reversals are counted only once.at n=18A073451
• Least k such that any sufficiently long repunit multiplied by k contains all nonzero digits in base n.at n=9A277059