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A113031 Triangle read by rows: n-th row begins with n and contains n terms with the same prime signature such that the (r+1)-th term == 1 (mod r-th term). 2
1, 2, 3, 3, 7, 29, 4, 9, 289, 332929, 5, 11, 23, 47, 283, 6, 55, 111, 334, 335, 671, 7, 29, 59, 709, 2837, 22697, 590123, 8, 4913, 2084349468684419, 24848244676397648518313556708104734780186593641363 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..32.

EXAMPLE

Triangle begins:

1

2 3

3 7 29

4 9 289 332929...

CROSSREFS

Sequence in context: A121875 A036251 A176022 * A127582 A157144 A096714

Adjacent sequences:  A113028 A113029 A113030 * A113032 A113033 A113034

KEYWORD

nonn,tabl

AUTHOR

Amarnath Murthy, Jan 04 2006

EXTENSIONS

Corrected and extended by Joshua Zucker, May 07 2006

a(32) from Max Alekseyev, Feb 13 2012

STATUS

approved

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Last modified February 21 12:10 EST 2018. Contains 299411 sequences. (Running on oeis4.)