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A062031 Group odd numbers into (1), (3,5,7), (9,11,13,15,17),...; a(n) = product of n-th group. 2
1, 105, 328185, 5568833025, 304513870485825, 40992233865440682825, 11492457771692770753505625, 5984524775454356180393209490625, 5325142910343897163530366857379506625, 7598549164899334249502031499667984969915625 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Harry J. Smith, Table of n, a(n) for n=1,...,100

EXAMPLE

a(2) =3*5*7 = 105.

PROG

(PARI) { for (n=1, 100, b=2*n^2 - 4*n + 3; write("b062031.txt", n, " ", prod(k=0, 2*n - 2, b + 2*k)) ) } \\ Harry J. Smith, Jul 30 2009

CROSSREFS

Sequence in context: A225217 A096150 A068256 * A199522 A036201 A286287

Adjacent sequences:  A062028 A062029 A062030 * A062032 A062033 A062034

KEYWORD

nonn

AUTHOR

Amarnath Murthy, Jun 02 2001

EXTENSIONS

More terms from Matthew Conroy, Jun 11 2001

STATUS

approved

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Last modified September 30 21:27 EDT 2020. Contains 337440 sequences. (Running on oeis4.)