a(0) = 1; a(n) = 7 * Sum_{k=1..n} binomial(n,k) * a(k-1).
A345078
a(0) = 1; a(n) = 7 * Sum_{k=1..n} binomial(n,k) * a(k-1).
Terms
- a(0) =1a(1) =7a(2) =63a(3) =609a(4) =6349a(5) =70693a(6) =835051a(7) =10408335a(8) =136290371a(9) =1867933865a(10) =26712000161a(11) =397487932457
External references
- oeis: A345078