1887876

Appears in sequences

• Smallest square with digit sum n (or 0 if no such square exists).at n=44A062685
• Smallest square whose sum of digits is A056991(n).at n=19A067178
• Number of n X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 1 vertically.at n=7A207688
• Number of permutations tau of {1,...,n} such that k^4 + tau(k)^4 is prime for every k = 1,...,n.at n=19A321611