44441

Appears in sequences

• Third column of A027446.at n=9A027458
• Numbers having four 4's in base 10.at n=17A043508
• Smallest semiprime containing exactly n 4's.at n=3A104690
• Self-describing integers with the rule: if the digit d, part of the integer i, is odd then there are d odd digits in this integer; if the digit d is even there are d even digits.at n=21A105776
• Near-repdigit semiprimes with 4 as repeated digit.at n=9A105985
• Any digit d in the sequence says: "I am part of an integer in which you'll find d digits d".at n=25A108571
• Numerators of third-order harmonic numbers (defined by Conway and Guy, 1996).at n=9A124837
• Numbers such that each decimal digit d (for all d in the range 1 <= d <= 9) occurs only in runs of length exactly d.at n=14A140057
• a(n) = (4*10^n - 31)/9.at n=4A173768
• Semiprimes formed by concatenating n, n, and 1 for n = 1, 2, 3,....at n=19A210711
• Expansion of e.g.f. 1 / Sum_{n >= 0} (n+1)^3*x^n/n!.at n=4A302870
• Row sums of A304336.at n=6A304338