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A062330 a(n) = product of the sum and product of the digits of a(n-1) (0 is not to be considered a factor in the product). 1
2, 4, 16, 42, 48, 384, 1440, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144, 144 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

EXAMPLE

a(4) = 42 hence a(5) = (4 + 2) * (4*2) = 6*8 = 48.

PROG

(PARI) SumD(x)= { s=0; while (x>9, s+=x-10*(x\10); x\=10); return(s + x) } ProdNzD(x)= { p=1; while (x>9, d=x-10*(x\10); if (d, p*=d); x\=10); return(p*x) } { for (n=1, 100, if (n>1, a=SumD(a)*ProdNzD(a), a=2); write("b062330.txt", n, " ", a) ) } \\ Harry J. Smith, Aug 05 2009

CROSSREFS

Sequence in context: A333022 A048222 A192890 * A133465 A110128 A148279

Adjacent sequences:  A062327 A062328 A062329 * A062331 A062332 A062333

KEYWORD

nonn,base,easy

AUTHOR

Amarnath Murthy, Jun 21 2001

EXTENSIONS

Corrected and extended by Larry Reeves (larryr(AT)acm.org) and Harvey P. Dale, Jun 22 2001

STATUS

approved

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Last modified August 8 02:22 EDT 2020. Contains 336290 sequences. (Running on oeis4.)