Numbers n with following property: suppose n^2 = d1 d2 d3 ...dk in decimal; then d1! + d2! + ... + dk! is a square.

A089185

Numbers n with following property: suppose n^2 = d1 d2 d3 ...dk in decimal; then d1! + d2! + ... + dk! is a square.

Terms

    a(0) =1a(1) =11a(2) =12a(3) =21a(4) =43a(5) =190a(6) =216a(7) =251a(8) =258a(9) =370a(10) =384a(11) =408a(12) =440a(13) =462a(14) =669a(15) =762a(16) =804a(17) =809a(18) =871a(19) =884a(20) =919a(21) =1188a(22) =1519a(23) =1520a(24) =1521a(25) =1790a(26) =1800a(27) =1875a(28) =2305a(29) =2312

External references