20331

Appears in sequences

• Smallest n-digit triangular number - smallest n-digit number.at n=10A095865
• Numbers of the form HMMSS with primes H < 24 and MM, SS < 60, for which the number of seconds after midnight, 3600*H+60*MM+SS, is also prime.at n=5A295011
• Prime time numbers on 6-digit clocks: numbers of the form HMMSS where H, MM, SS are primes, H < 24, MM and SS < 60.at n=27A295014
• Number of alternately co-strong compositions of n.at n=18A332338
• First members C of two non-consecutive numbers such that the sums of their cubes are equal to centered cube numbers and to at least one other sum of two cubes, i.e., A = B^3 + (B+1)^3 = C^3 + D^3 = E^3 + F^3.at n=9A352222
• a(n) is the number of distinct five-cuboid combinations that fill an n X n X n cube with cuboids of different volumes.at n=11A387040