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A060641
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Surround numbers of a length 2n zig-zag.
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1
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161, 257, 373, 509, 665, 841, 1037, 1253, 1489, 1745, 2021, 2317, 2633, 2969, 3325, 3701, 4097, 4513, 4949, 5405, 5881, 6377, 6893, 7429, 7985, 8561, 9157, 9773, 10409, 11065, 11741, 12437, 13153, 13889, 14645, 15421, 16217, 17033
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,1
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LINKS
| Harry J. Smith, Table of n, a(n) for n=2,...,1000
E. J. Friedman, Math. Magic
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FORMULA
| a(n) = 10n^2 + 46n + 29 with n > 1.
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PROG
| (PARI) { for (n=2, 1000, write("b060641.txt", n, " ", 10*n^2 + 46*n + 29); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 09 2009]
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CROSSREFS
| Cf. A047875 A000105 A060633.
Sequence in context: A025350 A025342 A189639 * A157954 A159545 A157337
Adjacent sequences: A060638 A060639 A060640 * A060642 A060643 A060644
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KEYWORD
| easy,nonn
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AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Apr 16 2001
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