18849

Appears in sequences

• a(n) = [ 2nd elementary symmetric function of {sqrt(k+1)} ], k = 1,2,...,n.at n=41A025219
• a(n) = 144*n^2 - 161*n + 45.at n=11A156711
• Diagonal sums of number triangle A172380.at n=11A172382
• Triangle read by rows, T(n,k) = Sum_{j=0..n} (-1)^(n-j)*C(-j-1,-n-1)*S2(k,j), S2 the Stirling set numbers A048993, for n>=0 and 0<=k<=n.at n=51A271702
• Isolated deficient numbers that are divisible by 3.at n=29A273255
• Number of compositions (ordered partitions) of n into distinct nonprime parts.at n=51A331917
• Odd composite integers m such that U(m)^2 == 1 (mod m) and V(m) == 6 (mod m), where U(m) and V(m) are the m-th generalized Lucas and Pell-Lucas numbers of parameters a=6 and b=-1, respectively.at n=21A337629
• Odd composite integers m such that A085447(m) == 6 (mod m).at n=28A338078
• Number of compositions (ordered partitions) of n into distinct parts >= 6.at n=55A339104