77777

Appears in sequences

• a(n) = 7*(10^n - 1)/9.at n=5A002281
• Smallest number containing n syllables in UK English.at n=16A002810
• Repdigit numbers, or numbers whose digits are all equal.at n=43A010785
• Numbers > 9 with all digits the same.at n=33A014181
• Smallest positive integer requiring n syllables to pronounce in American English.at n=15A045736
• Write what is described (putting a leading zero on numbers which have an odd number of digits).at n=57A056967
• Harmonic mean of digits is 7.at n=4A061546
• Worthless numbers: numbers without h, o, r, t, or w.at n=7A073419
• Squarefree numbers obtained by repeating a single digit.at n=27A077571
• Palindromes k such that 3k + 1 is also a palindrome.at n=30A083829
• a = a(n) is such that the a-th prime p(a) is the least prime with digital sum equal to n, or a(n)=0 if no such prime exists.at n=52A104290
• Copies of 7 and 1 alternately such that every partial concatenation is a prime.at n=4A110788
• Each number is the average of the numbers formed by all the possible permutations of the digits of that number.at n=48A160818
• Numbers which can be expressed as the product of numbers made of only sevens.at n=18A161145
• Number of achiral combinatorial maps with n edges.at n=7A170947
• Numbers n such that the decimal digits of n are not present in k*n, k=2..9.at n=14A175637
• The smallest number that has more copies of some digit than any previous number in the sequence.at n=46A179309
• Numbers whose set of base 10 digits is {0,7}.at n=31A204094
• a(n) is the smallest positive number such that n divides the sum of all numbers formed by cyclically permuting digits of a(n).at n=49A214019
• Largest k such that no sum of digits is divisible by n (zeros not allowed in the digits of k).at n=4A231155