Numbers k such that there are 15 digits in k^2 and for each factor f of 15 (1,3,5) the sum of digit groupings of size f is a square.
A153751
Numbers k such that there are 15 digits in k^2 and for each factor f of 15 (1,3,5) the sum of digit groupings of size f is a square.
Terms
- a(0) =10000000a(1) =10000001a(2) =10000002a(3) =10000003a(4) =10000004a(5) =10000005a(6) =10000010a(7) =10000011a(8) =10000012a(9) =10000013a(10) =10000020a(11) =10000021a(12) =10000022a(13) =10000030a(14) =10000031a(15) =10000200a(16) =10000300a(17) =10011003a(18) =10022000a(19) =10035990a(20) =10042440
External references
- oeis: A153751