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A244746 Numbers obtained by concatenating the squares of the digits of Catalan(n). 0
1, 1, 4, 25, 116, 164, 194, 16481, 11690, 1664364, 136498136, 2564496436, 4064014, 491648100, 436491616160, 81368116641625, 9259254936490, 148136161649810, 164949369644900, 149364943691810, 362536161401640, 41616363643649040, 811166442536936160 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..22.

FORMULA

a(n) = A048385(A000108(n)).

EXAMPLE

For n = 7, Catalan(7) = 429 and a(7) = 16481, which is the concatenation of the squares of the digits of 429. For n = 14, Catalan(14) = 2674440 and a(14) = 436491616160.

PROG

(MAGMA) [StringToInteger(&cat[IntegerToString(h): h in Reverse([i^2: i in Intseq(Catalan(n))])]): n in [0..30]];

CROSSREFS

Cf. A000108, A048385.

Sequence in context: A042651 A225692 A070764 * A110051 A273023 A013187

Adjacent sequences:  A244743 A244744 A244745 * A244747 A244748 A244749

KEYWORD

nonn,base

AUTHOR

Vincenzo Librandi, Jul 05 2014

STATUS

approved

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Last modified June 24 04:38 EDT 2019. Contains 324318 sequences. (Running on oeis4.)