80001

Appears in sequences

• Numbers n such that the digits of P_7(n), the n-th heptagonal number, end in n.at n=39A067271
• Automorphic numbers: numbers k such that k^6 ends with k. Also m-morphic numbers for all m not congruent to 26 (mod 50) but congruent to 6 (mod 10).at n=39A068408
• Numbers k such that k and k^2 use only the digits 0, 1, 4, 6 and 8.at n=59A136861
• a(n) = 50*n^2 + 1.at n=39A157916
• Smallest k such that each of the five factorials (5k)!, (5k+1)!, (5k+2)!, (5k+3)! and (5k+4)! has exactly 10^n trailing 0's. Zero, if no such k exists.at n=5A181581
• a(n) = 8*10^n + 1.at n=4A199689
• a(1) = 1; for n > 1: a(n) = smallest odd number greater than a(n-1) which does not use any digit used by a(n-1).at n=35A229364
• Number of partitions of n^4 into at most two parts.at n=20A274323
• Number x = concat(MSD(x),b) such that MSD(x)*b = d(x), where MSD(x) is the Most Significant Digit of x and d(x) is the number of divisors of x.at n=11A291618
• Numbers m such that m^m == m (mod 10^(len(m) + 2)), where len(m) is the number of digits of m (A055642).at n=24A373206