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A139264 a(n) = 70*n - 63. 10
7, 77, 147, 217, 287, 357, 427, 497, 567, 637, 707, 777, 847, 917, 987, 1057, 1127, 1197, 1267, 1337, 1407, 1477, 1547, 1617, 1687, 1757, 1827, 1897, 1967, 2037, 2107, 2177, 2247, 2317, 2387, 2457, 2527, 2597, 2667, 2737, 2807, 2877, 2947, 3017, 3087 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Multiples of 7 with unit digit equal to 7.

Conjecture: satisfies a linear recurrence having signature (2, -1). - Harvey P. Dale, May 06 2019

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..2000

FORMULA

a(n) = a(n-1) + 70.

a(n) = 70*n - 63, with n >= 1. - Paolo P. Lava, Sep 06 2010

MATHEMATICA

70*Range[50]-63 (* Harvey P. Dale, May 06 2019 *)

PROG

(MAGMA) [70*n-63: n in [1..50]]; // Vincenzo Librandi, Jun 19 2011

(PARI) a(n)=70*n-63 \\ Charles R Greathouse IV, Aug 25 2014

CROSSREFS

Subsequence of A034709, together with A017281, A017293, A139222, A139245, A017329, A139249, A139279 and A139280.

Sequence in context: A284068 A153688 A059195 * A045642 A292457 A292737

Adjacent sequences:  A139261 A139262 A139263 * A139265 A139266 A139267

KEYWORD

easy,nonn

AUTHOR

Odimar Fabeny, Jun 06 2008

EXTENSIONS

More terms from Reinhard Zumkeller, Jun 22 2008

STATUS

approved

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Last modified November 15 13:20 EST 2019. Contains 329149 sequences. (Running on oeis4.)