184740

Appears in sequences

• Composite numbers n such that sigma(n)+12 = sigma(n+12).at n=16A054902
• Number of interior balls in a truncated tetrahedral arrangement.at n=36A092966
• Least positive integer k such that both k and k*n belong to the set {m>0: 2*prime(prime(m))+1 = prime(p) for some prime p}.at n=43A261362
• Number of n X n arrays containing n copies of 0..n-1 with no equal horizontal neighbors and new values introduced sequentially from 0.at n=3A264939
• Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal horizontal neighbors and new values introduced sequentially from 0.at n=3A264942
• T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with no equal horizontal neighbors and new values introduced sequentially from 0.at n=24A264945
• Number of 4 X n arrays containing n copies of 0..4-1 with no equal horizontal neighbors and new values introduced sequentially from 0.at n=3A264947
• Number of nX4 arrays of permutations of 4 copies of 0..n-1 with no equal vertical neighbors and new values introduced sequentially from 0.at n=3A265231
• T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with no equal vertical neighbors and new values introduced sequentially from 0.at n=24A265232
• Number of 4 X n arrays containing n copies of 0..4-1 with no equal vertical neighbors and new values introduced sequentially from 0.at n=3A265234
• Expansion of Product_{k>=1} 1/(1 - k*x^k)^sigma(k), where sigma = A000203.at n=12A318483