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1, 6, 15, 36, 45, 90, 91, 200, 207, 270, 231, 540, 325, 546, 675, 1040, 561, 1242, 703, 1620, 1365, 1386, 1035, 3000, 1725, 1950, 2565, 3276, 1653, 4050, 1891, 5152, 3465, 3366, 4095, 7452, 2701, 4218, 4875, 9000, 3321, 8190, 3655
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Row sums of triangle A127470.
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FORMULA
| a(n) = n * A062949(n), where A062949 = (1, 3, 5, 9, 9, 15, 13, 25, 23,...)
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EXAMPLE
| a(5) = 45 = 5 * A062949(5) = 5 * 9.
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MAPLE
| A062949 := proc(n) add(numtheory[phi](d)*numtheory[tau](d), d=numtheory[divisors](n)) ; end proc:
A127469 := proc(n) n*A062949(n) ; end proc:
seq(A127469(n), n=1..80) ; # R. J. Mathar, Feb 09 2011
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CROSSREFS
| Cf. A062949, A127470.
Sequence in context: A045969 A100513 A191002 * A103106 A074132 A074149
Adjacent sequences: A127466 A127467 A127468 * A127470 A127471 A127472
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KEYWORD
| nonn,mult
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Jan 15 2007
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