

A171472


a(n) = 6*a(n1)8*a(n2) for n > 1; a(0) = 7, a(1) = 30.


13



7, 30, 124, 504, 2032, 8160, 32704, 130944, 524032, 2096640, 8387584, 33552384, 134213632, 536862720, 2147467264, 8589901824, 34359672832, 137438822400, 549755551744, 2199022731264, 8796091973632, 35184369991680
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OFFSET

0,1


COMMENTS

Related to Reverse and Add trajectory of 22 in base 2: A061561(4*n+2) = 12*a(n).
Third binomial transform of A010729.


LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..500
Index to sequences with linear recurrences with constant coefficients, signature (6,8)


FORMULA

a(n) = 8*4^n2^n.
G.f.: (712*x)/((12*x)*(14*x)).


PROG

(PARI) {m=22; v=concat([7, 30], vector(m2)); for(n=3, m, v[n]=6*v[n1]8*v[n2]); v}
(MAGMA) [8*4^n2^n: n in [0..30]]; // Vincenzo Librandi, May 31 2011


CROSSREFS

Cf. A061561, A010729 (repeat 7, 9), A171470, A171471, A171473.
Sequence in context: A026631 A037709 A037611 * A220720 A024311 A210100
Adjacent sequences: A171469 A171470 A171471 * A171473 A171474 A171475


KEYWORD

nonn


AUTHOR

Klaus Brockhaus, Dec 09 2009


STATUS

approved



