A246448 Numbers n such that a square will never end in the digits of n.

2, 3, 7, 8, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 22, 23, 26, 27, 28, 30, 31, 32, 33, 34, 35, 37, 38, 39, 40, 42, 43, 45, 46, 47, 48, 50, 51, 52, 53, 54, 55, 57, 58, 59, 60, 62, 63, 65, 66, 67, 68, 70, 71, 72, 73, 74, 75, 77, 78, 79, 80, 82, 83, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95

Offset

1,1

Comments

Complement of A238712.

Links

Table of n, a(n) for n=1..73.

Example

No square will ever end in a 2, thus 2 is a member of this sequence.

Prog

(PARI)
b(n)=v=[]; for(k=10^(n-1), 10^n, v=concat(v, k^2%10^n)); v=vecsort(v, , 8); v
for(n=1, 500, d=digits(n); if(!vecsearch(b(#d), n), print1(n, ", ")))

Crossrefs

Cf. A238712.

Sequence in context: A332699 A347153 A105266 * A054996 A338691 A129341

Adjacent sequences: A246445 A246446 A246447 * A246449 A246450 A246451

Keyword

nonn,base

Author

Derek Orr, Aug 26 2014

Status

approved