A158012 - OEIS

A158012

A000796(n)*A000796(n+1) mod 9.

3, 4, 4, 5, 0, 0, 3, 3, 6, 6, 4, 0, 0, 0, 0, 6, 6, 6, 5, 6, 3, 3, 6, 3, 0, 6, 6, 6, 5, 0, 0, 0, 0, 7, 1, 5, 4, 0, 0, 7, 6, 0, 0, 0, 0, 0, 3, 8, 5, 0, 0, 4, 7, 0, 0, 0, 1, 0, 0, 7, 2, 0, 0, 6, 0, 0, 2, 8, 6, 6, 0, 0, 3, 7, 3, 3, 0, 0, 0, 0, 0, 3, 3, 7, 0, 0, 3, 5, 7, 1, 6, 3, 8, 2, 1, 7, 0, 0, 6, 0, 0, 7, 2, 4, 5, 0

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OFFSET

1,1

COMMENTS

The product sequence of adjacent digits of pi is 3,4,4,5,45,18,12,30,15,15,40,72,63,63,27,6,6,24,32...

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

MATHEMATICA

Mod[Times@@@Partition[RealDigits[Pi, 10, 120][[1]], 2, 1], 9] (* Harvey P. Dale, Jun 18 2024 *)

CROSSREFS

Sequence in context: A345196 A185271 A352285 * A032446 A271563 A342938

Adjacent sequences: A158009 A158010 A158011 * A158013 A158014 A158015