212112

Appears in sequences

• Expansion of (theta_3(z)*theta_3(7z) + theta_2(z)*theta_2(7z))^4.at n=34A028596
• Positive numbers n such that n is a multiple of (product of digits of n) * (sum of digits of n).at n=28A049102
• a(n) is the smallest number k such that d(1)*1! + d(2)*2! + ... + d(p)*p! = n^2, where d(i) are the decimal digits of k.at n=39A198095
• List of subwords of A003842 arranged in lexicographic order.at n=26A213975
• List of words over {1,2} with equal numbers of 1's and 2's.at n=21A214218
• a(n) is the binary word s21s211s2 where s is a string of n 1's.at n=0A246999
• Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change 0,1 1,0 2,1 or -1,-1.at n=8A264472