28998

Appears in sequences

• a(n)^2 is a square whose decimal expansion digits occur with an exact frequency of 3.at n=10A052095
• Numbers k such that k^2 contains only digits {0,4,8}, not ending with zero.at n=10A058441
• McKay-Thompson series of class 31A for Monster.at n=41A058628
• Numbers k such that k and k^2 use only the digits 0, 2, 4, 8 and 9.at n=36A136909
• Number of binary strings of length n with equal numbers of 0001 and 0011 substrings.at n=16A164156
• Number of (n+1) X 3 binary arrays with rows and columns in nondecreasing order and with no 2 X 2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.at n=28A184064
• Numbers k such that k^2 has only digits 0, 4 and 8.at n=24A202170
• a(n) = 2*n^3 - 4*n^2 + 10*n - 2 (n>=1).at n=24A304161
• Number of excursions of length n with Motzkin-steps avoiding the consecutive steps UU and HH.at n=17A329666
• a(n) is the least multiple of n that is not a Niven (or Harshad) number.at n=53A357937
• Primitive practical numbers of the form 2 * 3^i * prime(k).at n=38A367481
• Numbers k that divide the k-th companion Pell number.at n=37A372899