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.
A198095
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.
Terms
- a(0) =1a(1) =4a(2) =9a(3) =27a(4) =79a(5) =225a(6) =108a(7) =249a(8) =999a(9) =2104a(10) =1005a(11) =2235a(12) =1007a(13) =2108a(14) =1119a(15) =2169a(16) =1999a(17) =22132a(18) =10003a(19) =21213a(20) =11133a(21) =21004a(22) =10024a(23) =22334a(24) =10015a(25) =21035a(26) =11106a(27) =21226a(28) =10007a(29) =22127
External references
- oeis: A198095