120841

Appears in sequences

• Strong pseudoprimes to base 45.at n=23A020271
• Expansion of 1/((1-5x)(1-6x)(1-9x)(1-10x)).at n=4A028174
• Triangle, read by rows, T(n, k) = t(k, n-k+1) - t(1, n) + 1 where t(n, m) = (n*m)!*Beta(n, m).at n=16A177848
• Triangle, read by rows, T(n, k) = t(k, n-k+1) - t(1, n) + 1 where t(n, m) = (n*m)!*Beta(n, m).at n=19A177848
• Numbers k such that 10^k - 123456789 is prime.at n=23A248350