550009

Properties

Appears in sequences

• Number of Schur rings over Z_{7^n}.at n=8A270787
• a(n) = n^8 + 7*n^7 + 34*n^6 + 111*n^5 + 275*n^4 + 511*n^3 + 703*n^2 + 623*n + 13.at n=4A270872
• Array T(n,k) of number of Schur rings over Z_{p^n} where n>=1 for p odd and k-th prime (by descending antidiagonals).at n=52A320948
• Primes having only {0, 5, 9} as digits.at n=25A385769
• Prime numbersat n=45324