1451519

Appears in sequences

• a(n) = 4*n! - 1.at n=9A173321
• A symmetrical triangle sequence:t(n,m)=(-1)^m*(n - m)!*Binomial[n - 1, m] + (-1)^(n - m + 1)*(n - (n - m + 1))!*Binomial[n - 1, n - m + 1].at n=28A176862
• A symmetrical triangle sequence:t(n,m)=(-1)^m*(n - m)!*Binomial[n - 1, m] + (-1)^(n - m + 1)*(n - (n - m + 1))!*Binomial[n - 1, n - m + 1].at n=35A176862
• Smallest number requiring n terms to be expressed as a sum of factorials.at n=39A200748
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2) + 1, where a(0) = 1, a(1) = 2, b(0) = 3.at n=26A294533
• a(n) = n!*T(n) - 1, where T(n) is the n-th triangular number.at n=7A305739