A001257 - OEIS

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A001257

Squares of numbers of rooted trees.

1, 1, 4, 16, 81, 400, 2304, 13225, 81796, 516961, 3392964, 22714756, 155900196, 1087218729, 7710771721, 55404215161, 403030713409, 2962388303281, 21983682632976, 164512124707984, 1240577449436224

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

LINKS

Table of n, a(n) for n=0..20.

Index entries for sequences related to rooted trees

CROSSREFS

Cf. A000081.

Sequence in context: A280923 A118997 A337839 * A133053 A342326 A110378

Adjacent sequences: A001254 A001255 A001256 * A001258 A001259 A001260

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved