A077731 Smallest square beginning with the reverse concatenation of first n natural numbers.

1, 2116, 321489, 43217476, 543216249, 65432105209, 76543216214404, 87654321389325625, 9876543214442601636, 109876543213216782564, 11109876543211013634144016, 12111098765432180129777502784

Offset

1,2

Links

Table of n, a(n) for n=1..12.

Crossrefs

Cf. A077732.

Sequence in context: A365240 A067632 A236446 * A077733 A324170 A324324

Adjacent sequences: A077728 A077729 A077730 * A077732 A077733 A077734

Keyword

base,nonn

Author

Amarnath Murthy, Nov 19 2002

Extensions

Corrected and extended by Sascha Kurz, Jan 04 2003

Status

approved