2550250domain: NAppears in sequencesPositive integers n such that n | (2^n + n/2 + 1).at n=32A015945Numbers k such that k | 3^k + 1.at n=21A015949Numbers k such that k | 7^k + 1.at n=27A0159543-magic series constant.at n=9A052460Numbers k such that k | 10^k + 9^k + 8^k + 7^k + 6^k + 5^k + 4^k + 3^k.at n=37A057283