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Search: id:A048487
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| 1, 6, 16, 36, 76, 156, 316, 636, 1276, 2556, 5116, 10236, 20476, 40956, 81916, 163836, 327676, 655356, 1310716, 2621436, 5242876, 10485756, 20971516, 41943036, 83886076, 167772156, 335544316, 671088636, 1342177276, 2684354556
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Row sums of triangle A135856. - Gary W. Adamson (qntmpkt(AT)yahoo.com), Dec 01 2007
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FORMULA
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a(n) =5*2^n-4. - Henry Bottomley (se16(AT)btinternet.com), May 29 2001
a(n)=2*a(n-1)+4, n>0, a(0)=1 - Paul Barry (pbarry(AT)wit.ie), Aug 25 2004
Row sums of triangle A131113 - Gary W. Adamson (qntmpkt(AT)yahoo.com), Jun 15 2007
a(n) = sum of (n+1)-th row terms of triangle A134636. A048487 = binomial transform of [1, 5, 5, 5,...]. - Gary W. Adamson (qntmpkt(AT)yahoo.com), Nov 04 2007
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MATHEMATICA
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a=1; lst={a}; k=5; Do[a+=k; AppendTo[lst, a]; k+=k, {n, 0, 5!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Dec 15 2008]
a=6; lst={1, a}; k=10; Do[a+=k; AppendTo[lst, a]; k+=k, {n, 0, 5!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Dec 17 2008]
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CROSSREFS
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n-th difference of a(n), a(n-1), ..., a(0) is (5, 5, 5, ...).
Diagonal of A062001. Cf. A048483.
A column of A119726.
Cf. A131113.
Cf. A134636.
Cf. A135856.
Sequence in context: A160997 A098943 A120586 this_sequence A124699 A064602 A058272
Adjacent sequences: A048484 A048485 A048486 this_sequence A048488 A048489 A048490
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu)
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