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A126884 (2^0)*(2^1)*(2^2)*(2^3)...(2^n)+1 = 2^T_n+1 (cf. A000217). 1
2, 3, 9, 65, 1025, 32769, 2097153, 268435457, 68719476737, 35184372088833, 36028797018963969, 7378697629483820645, 302231454903657293676545, 2475880078570760549798248449 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

For n>1 every odd/even pair share at least one factor.

LINKS

Table of n, a(n) for n=0..13.

FORMULA

a(n) = 2^A000217(n)+1. - Michel Marcus, Jul 16 2013

PROG

(PARI) a(n) = prod(k=0, n, 2^k) + 1  \\ Michel Marcus, Jul 16 2013

CROSSREFS

Sequence in context: A181273 A270394 A120032 * A054544 A269993 A132537

Adjacent sequences:  A126881 A126882 A126883 * A126885 A126886 A126887

KEYWORD

nonn

AUTHOR

Marco Matosic, Dec 29 2006

STATUS

approved

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Last modified November 14 07:29 EST 2019. Contains 329111 sequences. (Running on oeis4.)