51874849201domain: NAppears in sequencesa(n) = 2n^(n-1) - 1.at n=10A093460n-th row of the following triangle contains n terms of an arithmetic progression with the first term 1 such that the sum is the least possible n-th power. Sequence contains the leading diagonal.at n=10A093844a(n) = 2*11^n-1.at n=10A198974