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A246448 Numbers n such that a square will never end in the digits of n. 2
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified October 17 17:21 EDT 2021. Contains 348065 sequences. (Running on oeis4.)