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A055436 a(n) = concatenation of n^2 and n. 7
11, 42, 93, 164, 255, 366, 497, 648, 819, 10010, 12111, 14412, 16913, 19614, 22515, 25616, 28917, 32418, 36119, 40020, 44121, 48422, 52923, 57624, 62525, 67626, 72927, 78428, 84129, 90030, 96131, 102432, 108933, 115634, 122535, 129636 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..36.

FORMULA

a(n) = n^2*floor(log_10(n) + 1) + n.

a(n) = A055437(n) if 1 <= n < 10, a(n) = A055438(n) if 10 <= n < 100.

MAPLE

a:= n-> parse(cat(n*n, n)):

seq(a(n), n=1..100);  # Alois P. Heinz, Jan 03 2015

MATHEMATICA

Table[n^2*10^IntegerLength[n] + n, {n, 36}] (* Jayanta Basu, Jul 12 2013 *)

Table[FromDigits[Join[IntegerDigits[n^2], IntegerDigits[n]]], {n, 40}] (* Vincenzo Librandi, Jan 03 2015 *)

PROG

(MAGMA) [Seqint(Intseq(n) cat Intseq(n^2)): n in [1..40]]; // Vincenzo Librandi, Jan 03 2015

CROSSREFS

Cf. A053061, A055437 (10n^2+n), A055438 (100n^2+n).

Sequence in context: A338627 A101985 A055437 * A213772 A062517 A027978

Adjacent sequences:  A055433 A055434 A055435 * A055437 A055438 A055439

KEYWORD

base,easy,nonn

AUTHOR

Henry Bottomley, May 18 2000

STATUS

approved

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Last modified December 4 17:42 EST 2020. Contains 338935 sequences. (Running on oeis4.)