47723

Appears in sequences

• Number of base 19 n-digit numbers with adjacent digits differing by two or less.at n=6A126406
• a(n) is the smallest number of the form k*a(n-1)+a(n-2) for k>0 that is relatively prime to n, with a(0) = 0 and a(1) = 1.at n=20A206241
• The hyper-Wiener index of the zig-zag polyhex nanotube TUHC_6[2n,2] defined pictorially in Fig. 1 of the Eliasi et al. reference.at n=11A227704
• Lesser of 2 successive squarefree semiprimes (k, k+6) sandwiching 5 consecutive nonsquarefree numbers.at n=5A368778