18788

Appears in sequences

• Number of point-labeled reduced two-graphs with n nodes.at n=6A007833
• Expansion of Product_{m>=1} (1-m*q^m)^28.at n=5A022688
• Numbers k whose decimal representation, read as a base-19 value and divided by k, yields an integer.at n=11A032569
• Numbers having four 4's in base 8.at n=26A043440
• Expansion of (eta(q^7) / eta(q))^4 in powers of q.at n=11A121593
• Expansion of (eta(q^4) * eta(q^12) / (eta(q) * eta(q^3)))^2 in powers of q.at n=18A123647
• Row l=4 of array in A133713.at n=10A133714
• G.f. A(x) satisfies A(x) = 1 + Sum_{n>=1} A(x)^n * x^(2*n-1)/(1 - x^(2*n-1)).at n=12A192400
• Least b > p_n^2 such that [p_1^2,p_2^2,...,p_n^2] in base b is prime, where p_j denotes the j-th prime.at n=31A224197
• Expansion of 1/(1 - x - x^2 + x^5 + x^6 - x^7).at n=28A225490
• Number of ways of writing n as the sum of 7 triangular numbers.at n=43A226252
• Number of (n+1)X(2+1) 0..1 arrays x(i,j) with row sums sum{j^2*x(i,j), j=1..2+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.at n=10A232872
• Numbers equal to the determinant of a circulant matrix based on the base-9 digits of n.at n=16A303369
• Total volume of all rectangular prisms with dimensions (p,p,q) such that n = p + q, p divides q and p < q.at n=47A303973
• Two-column table read by rows: Primitive distinct pairs that have the same value of phi, sigma, and tau.at n=28A322688
• Number of partitions of n whose greatest part is a multiple of 4.at n=44A363046