A247885 Smallest square that remains a square when prefixed with n.

225, 25, 4225, 9, 625, 4, 225, 1, 3025, 5625, 9025, 1, 225, 4, 625, 9, 64, 49, 36, 25, 16, 5625, 87025, 8850625, 889914313729282379150390625, 9669767640625, 225, 9, 16, 25, 36, 4, 64, 81, 15625, 1, 1456358697509765625, 142604475904693603515625, 1050625

Offset

1,1

Links

Hiroaki Yamanouchi, Table of n, a(n) for n = 1..10000

Prog

(PARI)
a(n)=k=1; while(!issquare(eval(concat(Str(n), Str(k^2)))), k++); k^2
vector(24, n, a(n))

Crossrefs

Cf. A167035, A167036, A167037, A167038, A167039, A167041, A167042, A167043, A167044.

Sequence in context: A340501 A370611 A265432 * A345552 A345806 A044871

Adjacent sequences: A247882 A247883 A247884 * A247886 A247887 A247888

Keyword

nonn,base,look

Author

Derek Orr, Sep 25 2014

Extensions

a(25)-a(39) from Hiroaki Yamanouchi, Sep 26 2014

Status

approved