47744

Appears in sequences

• a(n) contains n digits (either '4' or '7') and is divisible by 2^n.at n=4A053332
• Main diagonal of array A[k,n] = n-th sum of 3 consecutive k-gonal numbers, k>2.at n=31A130423
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, -1, 1), (0, 1, 0), (1, 0, 0)}.at n=10A149838
• Numbers with digits 4 and 7 only.at n=42A284971
• Lexicographically first sequence of distinct terms such that the sum of any two terms is not a term of the sequence, and the sum of any two digits is not a digit of the sequence.at n=44A302938