16531326

Appears in sequences

• Number of Schur rings over Z_{7^n}.at n=10A270787
• a(n) = n^10 + 9*n^9 + 53*n^8 + 218*n^7 + 695*n^6 + 1754*n^5 + 3572*n^4 + 5854*n^3 + 7510*n^2 + 6559*n + 34.at n=4A270874